1.  drain(n = noun.act) drainage - emptying something accomplished by allowing liquid to run out of it;
is a kind of emptying, evacuation, voidance
Derived form verb drain₃

2.  drain(n = noun.artifact) - tube inserted into a body cavity (as during surgery) to remove unwanted material;
is a kind of tube, tubing

3.  drain(n = noun.artifact) drainpipe, waste pipe - a pipe through which liquid is carried away;
is a kind of pipage, pipe, piping
has particulars: culvert, scupper, cloaca, sewer, sewerage, soil pipe, trap
Derived forms verb drain₃, verb drain₁

4.  drain(n = noun.act) - a gradual depletion of energy or resources; "a drain on resources"; "a drain of young talent by emigration"
is a kind of depletion
has particulars: drawing, drawing off, brain drain
Derived form verb drain₂

1.  drain(v = verb.motion) run out - flow off gradually; "The rain water drains into this big vat"
is one way to course, feed, flow, run
Derived forms noun drain₃, noun drainage₁
Sample sentences: The water drains

2.  drain(v = verb.consumption) - deplete of resources; "The exercise class drains me of energy"
is one way to consume, deplete, eat, eat up, exhaust, run through, use up, wipe out
Derived form noun drain₄
Sample sentences: Somebody ----s something; Something ----s somebody; Something ----s something

3.  drain(v = verb.change) - empty of liquid; drain the liquid from; "We drained the oil tank"
is one way to empty
Derived forms noun drain₁, noun drain₃, noun drainage₁
Sample sentences: They drain the water

4.  drain(v = verb.change) debilitate, enfeeble - make weak; "Life in the camp drained him"
is one way to weaken
Sample sentences: The performance is likely to drain Sue

drain, v. & n.
--v.
1 tr. draw off liquid from, esp.: a make (land etc.) dry by providing an outflow for moisture. b (of a river) carry off the superfluous water of (a district). c remove purulent matter from (an abscess).
2 tr. (foll. by off, away) draw off (liquid) esp. by a pipe.
3 intr. (foll. by away, off, through) flow or trickle away.
4 intr. (of a wet cloth, a vessel, etc.) become dry as liquid flows away (put it there to drain).
5 tr. (often foll. by of) exhaust or deprive (a person or thing) of strength, resources, property, etc.
6 tr. a drink (liquid) to the dregs. b empty (a vessel) by drinking the contents.
--n.
1 a a channel, conduit, or pipe carrying off liquid, esp. an artificial conduit for water or sewage. b a tube for drawing off the discharge from an abscess etc.
2 a constant outflow, withdrawal, or expenditure (a great drain on my resources).

Idiom:
down the drain colloq. lost, wasted. laugh like a drain laugh copiously; guffaw.

Etymology:
OE dre(a)hnian f. Gmc

VB  spend, expend, use, consume, swallow up, exhaust, impoverish, spill, drain, empty, disperse, cast away, fool away, muddle away, throw away, fling away, fritter away, burn the candle at both ends, waste, squander, waste its sweetness on the desert air, cast one's bread upon the waters, cast pearls before swine, employ a steam engine to crack a nut, waste powder and shot, break a butterfly on a wheel, labor in vain, cut blocks with a razor, pour water into a sieve, leak, run to waste, ebb, melt away, run dry, dry up.

VB  be clean, render clean, clean, cleanse, mundify, rinse, wring, flush, full, wipe, mop, sponge, scour, swab, scrub, brush up, wash, lave, launder, buck, absterge, deterge, decrassify, clear, purify, depurate, despumate, defecate, purge, expurgate, elutriate, lixiviate, edulcorate, clarify, refine, rack, filter, filtrate, drain, strain, disinfect, fumigate, ventilate, deodorize, whitewash, castrate, emasculate, sift, winnow, pick, weed, comb, rake, brush, sweep, rout out, clear out, sweep out, make a clean sweep of.

N  uncleanness, impurity, immundity, immundicity, impurity, defilement, contamination, defoedation, soilure, soiliness, abomination, leaven, taint, tainture, fetor, decay, putrescence, putrefaction, corruption, mold, must, mildew, dry rot, mucor, rubigo, slovenry, slovenliness, squalor, dowdy, drab, slut, malkin, slattern, sloven, slammerkin, slammock, slummock, scrub, draggle-tail, mudlark, dust-man, sweep, beast, dirt, filth, soil, slop, dust, cobweb, flue, smoke, soot, smudge, smut, grit, grime, raff, sossle, sozzle, sordes, dregs, grounds, lees, argol, sediment, settlement heeltap, dross, drossiness, mother, precipitate, scoriae, ashes, cinders, recrement, slag, scum, froth, hogwash, ditchwater, dishwater, bilgewater, rinsings, cheeseparings, sweepings, offscourings, outscourings, off scum, caput mortuum, residuum, sprue, fecula, clinker, draff, scurf, scurfiness, exuviae, morphea, fur, furfur, dandruff, tartar, riffraff, vermin, louse, flea, bug, chinch, mud, mire, quagmire, alluvium, silt, sludge, slime, slush, slosh, sposh, spawn, offal, gurry, lientery, garbage, carrion, excreta, slough, peccant humor, pus, matter, suppuration, lienteria, faeces, feces, excrement, ordure, dung, crap, shit, sewage, sewerage, muck, coprolite, guano, manure, compost, dunghill, colluvies, mixen, midden, bog, laystall, sink, privy, jakes, toilet, john, head, cess, cesspool, sump, sough, cloaca, latrines, drain, sewer, common sewer, Cloacina, dust hole, sty, pigsty, lair, den, Augean stable, sink of corruption, slum, rookery, dirty, filthy, grimy, unclean, impure, soiled, not to be handled with kid gloves, dusty, snuffy, smutty, sooty, smoky, thick, turbid, dreggy, slimy, mussy, slovenly, untidy, messy, uncleanly, unkempt, sluttish, dowdy, draggle-tailed, uncombed, unscoured, unswept, unwiped, unwashed, unstrained, unpurified, squalid, lutose, slammocky, slummocky, sozzly, nasty, coarse, foul, offensive, abominable, beastly, reeky, reechy, fetid, decayed, moldy, musty, mildewed, rusty, moth-eaten, mucid, rancid, weak, bad, gone bad, etercoral, lentiginous, touched, fusty, effete, reasty, rotten, corrupt, tainted, high, flyblown, maggoty, putrid, putrefactive, putrescent, putrefied, saprogenic, saprogenous, purulent, carious, peccant, fecal, feculent, stercoraceous, excrementitious, scurfy, scurvy, impetiginous, gory, bloody, rotting, rotten as a pear, rotten as cheese, crapulous, gross, fimetarious, fimicolous, they that touch pitch will be defiled.

VB  apply a remedy, doctor, dose, physic, nurse, minister to, attend, dress the wounds, plaster, drain, prevent, relieve, palliate, restore, drench with physic, bleed, cup, let blood, manicure, operate, excise, cut out, incise.

VB  take, catch, hook, nab, bag, sack, pocket, put into one's pocket, receive, accept, reap, crop, cull, pluck, gather, draw, appropriate, expropriate, impropriate, assume, possess oneself of, take possession of, commandeer, lay one's hands on, clap one's hands on, help oneself to, make free with, dip one's hands into, lay under contribution, intercept, scramble for, deprive of, take away, carry away, bear away, take off, carry off, bear off, adeem, abstract, hurry off with, run away with, abduct, steal, ravish, seize, pounce upon, spring upon, swoop to, swoop down upon, take by storm, take by assault, snatch, reave, snap up, nip up, whip up, catch up, kidnap, crimp, capture, lay violent hands on, get hold of, lay hold of, take hold of, catch hold of, lay fast hold of, take firm hold of, lay by the heels, take prisoner, fasten upon, grip, grapple, embrace, gripe, clasp, grab, clutch, collar, throttle, take by the throat, claw, clinch, clench, make sure of, catch at, jump at, make a grab at, snap at, snatch at, reach, make a long arm, stretch forth one's hand, take from, take away from, disseize, deduct, retrench, dispossess, ease one of, snatch from one's grasp, tear from, tear away from, wrench from, wrest from, wring from, extort, deprive of, bereave, disinherit, cut off with a shilling, oust, divest, levy, distrain, confiscate, sequester, sequestrate, accroach, usurp, despoil, strip, fleece, shear, displume, impoverish, eat out of house and home, drain, drain to the dregs, gut, dry, exhaust, swallow up, absorb, draw off, suck the blood of, suck like a leech, retake, resume, recover.

VB  be prodigal, squander, lavish, sow broadcast, pour forth like water, blow, blow in, pay through the nose, spill, waste, dissipate, exhaust, drain, eat out of house and home, overdraw, outrun the constable, run out, run through, misspend, throw good money after bad, throw the helve after the hatchet, burn the candle at both ends, make ducks and drakes of one's money, fool away one's money, potter away one's money, muddle away one's money, fritter away one's money, throw away one's money, run through one's money, pour water into a sieve, kill the goose that lays the golden eggs, manger son ble en herbe.

N  egress, exit, issue, emersion, emergence, outbreak, outburst, eruption, proruption, emanation, egression, evacuation, exudation, transudation, extravasation, perspiration, sweating, leakage, percolation, distillation, oozing, gush, outpour, outpouring, effluence, effusion, effluxion, drain, dribbling, defluxion, drainage, outcome, output, discharge, export, expatriation, emigration, remigration, debouch, debouche, emunctory, exodus, emigrant, outlet, vent, spout, tap, sluice, floodgate, pore, vomitory, outgate, sally port, way out, mouth, door, path, conduit, airpipe, effused, outgoing.

VB  emerge, emanate, issue, egress, go out of, come out of, move out of, pass out of, pour out of, flow out of, pass out of, evacuate, exude, transude, leak, run through, out through, percolate, transcolate, egurgitate, strain, distill, perspire, sweat, drain, ooze, filter, filtrate, dribble, gush, spout, flow out, well, well out, pour, trickle, effuse, extravasate, disembogue, discharge itself, debouch, come forth, break forth, burst out, burst through, find vent, escape.

VB  be dry, render dry, dry, dry up, soak up, sponge, swab, wipe, drain, desiccate, dehydrate, exsiccate, parch, kiln dry, vacuum dry, blow dry, oven dry, hang out to dry, mummify, be fine, hold up.

N  conduit, channel, duct, watercourse, race, head race, tail race, abito, aboideau, aboiteau, bito, acequia, acequiador, acequiamadre, arroyo, adit, aqueduct, canal, trough, gutter, pantile, flume, ingate, runner, lock-weir, tedge, vena, dike, main, gully, moat, ditch, drain, sewer, culvert, cloaca, sough, kennel, siphon, piscina, pipe, funnel, tunnel, water pipe, waste pipe, emunctory, gully hole, artery, aorta, pore, spout, scupper, adjutage, ajutage, hose, gargoyle, gurgoyle, penstock, weir, flood gate, water gate, sluice, lock, valve, rose, waterworks, pipeline, vascular.

brain drain, down the drain, drain basket, drain the cup, water drain