1.  double(n = noun.act) two-bagger, two-base hit, two-baser - a base hit on which the batter stops safely at second base; "he hit a double to deep centerfield"
is a kind of base hit, safety
has particulars: line-drive double, line double
Derived form verb double₂

2.  double(n = noun.person) stunt man, stunt woman - a stand-in for movie stars to perform dangerous stunts; "his first job in Hollywood was as a double for Clark Gable"
is a kind of backup, backup man, fill-in, relief, reliever, stand-in, substitute

3.  double(n = noun.person) image, look-alike - someone who closely resembles a famous person (especially an actor); "he could be Gingrich's double"; "she's the very image of her mother"
is a kind of individual, mortal, person, somebody, someone, soul
has particulars: clone, dead ringer, ringer

4.  double(n = noun.cognition) - a quantity that is twice as great as another; "36 is the double of 18"
is a kind of multiple
Derived forms verb double₁, verb double₆, adjective double₃

5.  double(n = noun.act) doubling - raising the stakes in a card game by a factor of 2; "I decided his double was a bluff"
is a kind of raise
is a part of card game, cards
Derived forms verb double₅, adjective double₃

1.  double(s = adj.all) dual, three-fold, threefold, treble, two-fold, twofold - having more than one decidedly dissimilar aspects or qualities; "a double (or dual) role for an actor"; "the office of a clergyman is twofold; public preaching and private influence"; "every episode has its double and treble meaning"

2.  double(s = adj.all) dual, duple - consisting of or involving two parts or components usually in pairs; "an egg with a double yolk"; "a double (binary) star"; "double doors"; "dual controls for pilot and copilot"; "duple (or double) time consists of two (or a multiple of two) beats to a measure"

3.  double(s = adj.all) doubled, two-fold, twofold - twice as great or many; "ate a double portion"; "the dose is doubled"; "a twofold increase"
Derived forms noun double₅, noun double₄

4.  double(a = adj.all) - used of flowers having more than the usual number of petals in crowded or overlapping arrangements; "double chrysanthemums have many rows of petals and are usually spherical or hemispherical"
Antonym: single

5.  double(a = adj.all) bivalent - used of homologous chromosomes associated in pairs in synapsis;

6.  double(s = adj.all) - large enough for two; "a double bed"; "a double room"

7.  double(s = adj.all) forked - having two meanings with intent to deceive; "a sly double meaning"; "spoke with forked tongue"

1.  double(v = verb.change) duplicate - increase twofold; "The population doubled within 50 years"
is one way to manifold, multiply
Derived forms noun double₄, noun doubling₂, noun doubling₁
Sample sentences: They double their earnings this year; Their earnings double this year

2.  double(v = verb.contact) - hit a two-base hit;
is one way to hit
Derived form noun double₁
Sample sentences: Somebody ----s

3.  double(v = verb.motion) double over, double up - bend over or curl up, usually with laughter or pain; "He doubled and vomited violently"
is one way to bend, flex
Sample sentences: Somebody ----s

4.  double(v = verb.contact) - do double duty; serve two purposes or have two functions; "She doubles as his wife and secretary"
is one way to function, go, operate, run, work
Sample sentences: It is ----ing

5.  double(v = verb.possession) - bridge: make a demand for (a card or suit);
is one way to bid, call
Derived form noun double₅
Sample sentences: Somebody ----s something

6.  double(v = verb.creation) duplicate, reduplicate, repeat, replicate - make or do or perform again; "He could never replicate his brilliant performance of the magic trick"
is one way to reproduce
Derived form noun double₄
Sample sentences: Somebody ----s something

1.  double(r = adv.all) - downward and forward; "he was bent double with pain"

2.  double(r = adv.all) - two together; "some people sleep better double"

3.  double(r = adv.all) doubly, twice - to double the degree; "she was doubly rewarded"; "his eyes were double bright"

double, adj., adv., n., & v.
--adj.
1 a consisting of two usu. equal parts or things; twofold. b consisting of two identical parts.
2 twice as much or many (double the amount; double the number; double thickness).
3 having twice the usual size, quantity, strength, etc. (double whisky).
4 designed for two people (double bed).
5 a having some part double. b (of a flower) having more than one circle of petals. c (of a domino) having the same number of pips on each half.
6 having two different roles or interpretations, esp. implying confusion or deceit (double meaning; leads a double life).
7 Mus. lower in pitch by an octave (double bassoon).
--adv.
1 at or to twice the amount etc. (counts double).
2 two together (sleep double).
--n.
1 a a double quantity or thing; twice as much or many. b colloq. a double measure of spirits.
2 a a counterpart of a person or thing; a person who looks exactly like another. b an understudy. c a wraith.
3 (in pl.) Sport (in lawn tennis) a game between two pairs of players.
4 Sport a pair of victories over the same team, a pair of championships at the same game, etc.
5 a system of betting in which the winnings and stake from the first bet are transferred to a second.
6 Bridge the doubling of an opponent's bid.
7 Darts a hit on the narrow ring enclosed by the two outer circles of a dartboard, scoring double.
8 a sharp turn, esp. of the tracks of a hunted animal, or the course of a river.
--v.
1 tr. & intr. make or become twice as much or many; increase twofold; multiply by two.
2 tr. amount to twice as much as.
3 a tr. fold or bend (paper, cloth, etc.) over on itself. b intr. become folded.
4 a tr. (of an actor) play (two parts) in the same piece. b intr. (often foll. by for) be understudy etc.
5 intr. (usu. foll. by as) play a twofold role.
6 intr. turn sharply in flight or pursuit; take a tortuous course.
7 tr. Naut. sail round (a headland).
8 tr. Bridge make a call increasing the value of the points to be won or lost on (an opponent's bid).
9 Mus. a intr. (often foll. by on) play two or more musical instruments (the clarinettist doubles on tenor sax). b tr. add the same note in a higher or lower octave to (a note).
10 tr. clench (a fist).
11 intr. move at twice the usual speed; run.
12 Billiards a intr. rebound. b tr. cause to rebound.

Idiom:
at the double running, hurrying. bent double folded, stooping. double acrostic see ACROSTIC. double agent one who spies simultaneously for two rival countries etc. double axe an axe with two blades. double back take a new direction opposite to the previous one. double-banking
1 double-parking.
2 Austral. & NZ riding two on a horse etc.
double-barrelled
1 (of a gun) having two barrels.
2 Brit. (of a surname) having two parts joined by a hyphen.
3 twofold.
double-bass
1 the largest and lowest-pitched instrument of the violin family.
2 its player. double bill a programme with two principal items. double bind a dilemma. double-blind adj. (of a test or experiment) in which neither the tester nor the subject has knowledge of identities etc. that might lead to bias.
--n. such a test or experiment. double bluff an action or statement intended to appear as a bluff, but in fact genuine. double boiler a saucepan with a detachable upper compartment heated by boiling water in the lower one. double bond Chem. a pair of bonds between two atoms in a molecule. double-book accept two reservations simultaneously for (the same seat, room, etc.). double-breasted (of a coat etc.) having two fronts overlapping across the body. double-check verify twice or in two ways. double chin a chin with a fold of loose flesh below it. double-chinned having a double chin. double concerto a concerto for two solo instruments. double cream thick cream with a high fat-content. double-cross v.tr. deceive or betray (a person one is supposedly helping).
--n. an act of doing this. double-crosser a person who double-crosses. double dagger Printing = double obelus. double-dealer a deceiver. double-dealing n. deceit, esp. in business.
--adj. deceitful; practising deceit. double-decker
1 esp. Brit. a bus having an upper and lower deck.
2 colloq. anything consisting of two layers. double-declutch see DECLUTCH. double decomposition Chem. a chemical reaction involving exchange of radicals between two reactants: also called METATHESIS. double density Computing designating a storage device, esp. a disk, having twice the basic capacity. double dummy Bridge play with two hands exposed, allowing every card to be located. double Dutch Brit. colloq. incomprehensible talk. double-dyed deeply affected with guilt.
double eagle
1 a figure of a two-headed eagle.
2 US Golf = ALBATROSS.
3 US a coin worth twenty dollars.
double-edged
1 having two functions or (often contradictory) applications.
2 (of a knife etc.) having two cutting-edges. double entry a system of bookkeeping in which each transaction is entered as a debit in one account and a credit in another. double exposure Photog. the accidental or deliberate repeated exposure of a plate, film, etc.
double-faced
1 insincere.
2 (of a fabric or material) finished on both sides so that either may be used as the right side. double fault (in lawn tennis) two consecutive faults in serving. double feature a cinema programme with two full-length films. double figures the numbers from 10 to 99.
double first Brit.
1 first-class honours in two subjects or examinations at a university.
2 a person achieving this. double-fronted (of a house) with principal windows on either side of the front door. double-ganger = DOPPELG{Auml}NGER.
double glazing
1 a window consisting of two layers of glass with a space between them, designed to reduce loss of heat and exclude noise.
2 the provision of this. double Gloucester a kind of hard cheese orig. made in Gloucestershire.
double header
1 a train pulled by two locomotives coupled together.
2 US two games etc. in succession between the same opponents.
3 Austral. colloq. a coin with a head on both sides. double helix a pair of parallel helices with a common axis, esp. in the structure of the DNA molecule. double-jointed having joints that allow unusual bending of the fingers, limbs, etc. double-lock lock by a double turn of the key. double negative Gram. a negative statement containing two negative elements (e.g. didn't say nothing).

Usage:
Considered ungrammatical in standard English. double obelus (or obelisk) Printing a sign used to introduce a reference. double or quits a gamble to decide whether a player's loss or debt be doubled or cancelled. double-park park (a vehicle) alongside one that is already parked at the roadside. double play Baseball putting out two runners. double pneumonia pneumonia affecting both lungs. double-quick very quick or quickly. double refraction Optics refraction forming two separate rays from a single incident ray. double rhyme a rhyme including two syllables. double salt Chem. a salt composed of two simple salts and having different crystal properties from either. double saucepan Brit. = double boiler. double shuffle Dancing a shuffle executed twice with one foot and then twice with the other. double standard
1 a rule or principle applied more strictly to some people than to others (or to oneself).
2 bimetallism. double star two stars actually or apparently very close together. double-stopping Mus. the sounding of two strings at once on a violin etc. double take a delayed reaction to a situation etc. immediately after one's first reaction. double-talk verbal expression that is (usu. deliberately) ambiguous or misleading. double-think the mental capacity to accept contrary opinions or beliefs at the same time esp. as a result of political indoctrination. double time 1 payment of an employee at twice the normal rate.
2 Mil. the regulation running-pace. double-tonguing rapid articulation in playing a wind instrument. double top Darts a score of double twenty.
double up
1 a bend or curl up. b cause to do this, esp. by a blow.
2 be overcome with pain or laughter.
3 share or assign to a room, quarters, etc., with another or others.
4 fold or become folded.
5 use winnings from a bet as stake for another.

Derivative:
doubler n. doubly adv.

Etymology:
ME f. OF doble, duble (n.), dobler, dubler (v.) f. L duplus DUPLE

N  similarity, resemblance, likeness, similitude, semblance, affinity, approximation, parallelism, agreement, analogy, analogicalness, correspondence, homoiousia, parity, connaturalness, connaturality, brotherhood, family likeness, alliteration, rhyme, pun, repetition, sameness, uniformity, isogamy, analogue, the like, match, pendant, fellow companion, pair, mate, twin, double, counterpart, brother, sister, one's second self, alter ego, chip of the old block, par nobile fratrum, Arcades ambo, birds of a feather, et hoc genus omne, gens de meme famille, parallel, simile, type, image, photograph, close resemblance, striking resemblance, speaking resemblance, faithful likeness, faithful resemblance, similar, resembling, like, alike, twin, analogous, analogical, parallel, of a piece, such as, so, homoiousian, connatural, congener, allied to, akin to, approximate, much the same, near, close, something like, sort of, in the ballpark, such like, a show of, mock, pseudo, simulating, representing, exact, lifelike, faithful, true to nature, true to life, the very image, the very picture of, for all the world like, comme deux gouttes d'eau, as like as two peas in a pod, as like as it can stare, instar omnium, cast in the same mold, ridiculously like, as if, so to speak, as it were, as if it were, quasi, just as, veluti in speculum, et sic de similibus, tel maitre tel valet, tel pere tel fils, like master, like servant, like father, like son, the fruit doesn't fall far from the tree, a chip off the old block.

VB  be cunning, have cut one's eyeteeth, contrive, live by one's wits, maneuver, intrigue, gerrymander, finesse, double, temporize, stoop to conquer, reculer pour mieux sauter, circumvent, steal a march upon, overreach, throw off one's guard, surprise, snatch a verdict, waylay, undermine, introduce the thin end of the wedge, play a deep game, play tricks with, ambiguas in vulgum spargere voces, flatter, make things pleasant, have an ax to grind, dodge, sidestep, bob and weave.

N  duality, dualism, duplicity, biplicity, biformity, polarity, two, deuce, couple, duet, brace, pair, cheeks, twins, Castor and Pollux, gemini, Siamese twins, fellows, yoke, conjugation, dispermy, doublets, dyad, span, two, twin, dual, dualistic, double, binary, binomial, twin, biparous, dyadic, conduplicate, duplex, biduous, binate, diphyletic, dispermic, unijugate, tete-a-tete, coupled, conjugate, both, both the one and the other.

VB  double, redouble, duplicate, reduplicate, geminate, repeat, renew.

N  duplication, doubling, gemination, ingemination, reduplication, iteration, renewal, double, doubled, bicipital, bicephalous, bidental, bilabiate, bivalve, bivalvular, bifold, biform, bilateral, bifarious, bifacial, twofold, two-sided, disomatous, duplex, double-faced, double-headed, twin, duplicate, ingeminate, second, twice, once more, over again, as much again, twofold, secondly, in the second place, again.

N  substitution, commutation, supplanting, metaphor, metonymy, substitute, ersatz, makeshift, temporary expedient, replacement, succedaneum, shift, pis aller, stopgap, jury rigging, jury mast, locum tenens, warming pan, dummy, scapegoat, double, changeling, quid pro quo, alternative, representative, palimpsest, price, purchase money, consideration, equivalent, substituted, ersatz, phony, vicarious, subdititious, instead, in place of, in lieu of, in the stead of, in the room of, faute de mieux.

N  fold, plicature, plait, pleat, ply, crease, tuck, gather, flexion, flexure, joint, elbow, double, doubling, duplicature, gather, wrinkle, rimple, crinkle, crankle, crumple, rumple, rivel, ruck, ruffle, dog's ear, corrugation, frounce, flounce, lapel, pucker, crow's feet, plication, folded, fluted, pleated.

VB  fold, double, plicate, plait, crease, wrinkle, crinkle, crankle, curl, cockle up, cocker, rimple, rumple, flute, frizzle, frounce, rivel, twill, corrugate, ruffle, crimple, crumple, pucker, turn down, double down, down under, tuck, ruck, hem, gather.

VB  recede, regrade, return, revert, retreat, retire, retrograde, retrocede, back out, back down, balk, crawfish, crawl, withdraw, rebound, go back, come back, turn back, hark back, draw back, fall back, get back, put back, run back, lose ground, fall astern, drop astern, backwater, put about, backtrack, take the back track, veer round, double, wheel, countermarch, ebb, regurgitate, jib, shrink, shy, turn tail, turn round, turn upon one's heel, turn one's back upon, retrace one's steps, dance the back step, sound a retreat, beat a retreat, go home.

N  improbity, dishonesty, dishonor, deviation from rectitude, disgrace, fraud, lying, bad faith, Punic faith, mala fides, Punica fides, infidelity, faithlessness, Judas kiss, betrayal, breach of promise, breach of trust, breach of faith, prodition, disloyalty, treason, high treason, apostasy, nonobservance, shabbiness, villainy, villany, baseness, abjection, debasement, turpitude, moral turpitude, laxity, trimming, shuffling, perfidy, perfidiousness, treachery, double dealing, unfairness, knavery, roguery, rascality, foul play, jobbing, jobbery, graft, bribery, venality, nepotism, corruption, job, shuffle, fishy transaction, barratry, sharp practice, heads I win tails you lose, mouth honor, dishonest, dishonorable, unconscientious, unscrupulous, fraudulent, knavish, disgraceful, wicked, false-hearted, disingenuous, unfair, one-sided, double, double- hearted, double-tongued, double-faced, timeserving, crooked, tortuous, insidious, Machiavelian, dark, slippery, fishy, perfidious, treacherous, perjured, infamous, arrant, foul, base, vile, ignominious, blackguard, contemptible, unrespectable, abject, mean, shabby, little, paltry, dirty, scurvy, scabby, sneaking, groveling, scrubby, rascally, pettifogging, beneath one, low-minded, low-thoughted, base-minded, undignified, indign, unbecoming, unbeseeming, unbefitting, derogatory, degrading, infra dignitatem, beneath one's dignity, ungentlemanly, ungentlemanlike, unknightly, unchivalric, unmanly, unhandsome, recreant, inglorious, corrupt, venal, debased, mongrel, faithless, of bad faith, false, unfaithful, disloyal, untrustworthy, trustless, trothless, lost to shame, dead to honor, barratrous, dishonestly, mala fide, like a thief in the night, by crooked paths, Int, O tempora!, O mores!, corruptissima respublica plurimae leges.

N  falsehood, falseness, falsity, falsification, deception, untruth, guile, lying, untruth, guile, lying, misrepresentation, mendacity, perjury, false swearing, forgery, invention, fabrication, subreption, covin, perversion of truth, suppression of truth, suppressio veri, perversion, distortion, false coloring, exaggeration, prevarication, equivocation, shuffling, fencing, evasion, fraud, suggestio falsi, mystification, simulation, dissimulation, dissembling, deceit, blague, sham, pretense, pretending, malingering, lip homage, lip service, mouth honor, hollowness, mere show, mere outside, duplicity, double dealing, insincerity, hypocrisy, cant, humbug, jesuitism, jesuitry, pharisaism, Machiavelism, organized hypocrisy, crocodile tears, mealy-mouthedness, quackery, charlatanism, charlatanry, gammon, bun-kum, bumcombe, flam, bam, flimflam, cajolery, flattery, Judas kiss, perfidy, il volto sciolto i pensieri stretti, unfairness, artfulness, misstatement, false, deceitful, mendacious, unveracious, fraudulent, dishonest, faithless, truthless, trothless, unfair, uncandid, hollow-hearted, evasive, uningenuous, disingenuous, hollow, sincere, Parthis mendacior, forsworn, artificial, contrived, canting, hypocritical, jesuitical, pharisaical, tartuffish, Machiavelian, double, double tongued, double faced, double handed, double minded, double hearted, double dealing, Janus faced, smooth-faced, smooth spoken, smooth tongued, plausible, mealy-mouthed, affected, collusive, collusory, artful, perfidious, spurious, untrue, falsified, covinous, falsely, a la tartufe, with a double tongue, silly, blandae mendacia lingua, falsus in uno falsus in omnibus, I give him joy that's awkward at a lie, la mentira tiene las piernas cortas, O what a goodly outside falsehood hath.

daily double, double agent, double back, double bar, double bass, double bassoon, double bed, double bind, double birdie, double blind, double bogey, double boiler, double bond, double check, double chin, double clinch, double cream, double creme, double crochet, double cross, double dagger, double damages, double date, double dealer, double dealing, double decomposition, double decomposition reaction, double digit, double dipper, double dipping, double door, double dribble, double dutch, double dye, double eagle, double edged, double entendre, double entry, double fault, double feature, double first, double flat, double glazing, double gloucester, double gold, double header, double helix, double indemnity, double jeopardy, double knit, double leg circle, double meaning, double negative, double obelisk, double over, double personality, double play, double pneumonia, double quick, double quotes, double reed, double refraction, double replacement reaction, double reverse, double rhyme, double salt, double saucepan, double sharp, double standard, double standard of sexual behavior, double star, double stitch, double stopping, double take, double talk, double time, double tongue, double up, double vision, freedom from double jeopardy, line double, line-drive double, on the double, see double