1.  junction(n = noun.artifact) Array - the place where two or more things come together; Array
is a kind of place, spot, topographic point
has particulars: interchange, carrefour, crossing, crossroad, crossway, intersection, railway junction, t-junction, circle, rotary, roundabout, traffic circle

2.  junction(n = noun.state) colligation, conjugation, conjunction - the state of being joined together; Array
is a kind of unification, union
has particulars: anastomosis, inosculation, synapse

3.  junction(n = noun.shape) articulation, join, joint, juncture - the shape or manner in which things come together and a connection is made; Array
is a kind of connection, connexion, link
has particulars: esophagogastric junction, oesophagogastric junction

4.  junction(n = noun.artifact) conjunction - something that joins or connects; Array
is a kind of connecter, connection, connective, connector, connexion
has particulars: contact, tangency, joint, barrier strip, junction barrier, splice, splicing, thermojunction

5.  junction(n = noun.act) adjunction - an act of joining or adjoining things; Array
is a kind of connection, connexion, joining
Derived form verb join₂

1.  The act of joining, or the state of being joined; union; combination; coalition; as, the junction of two armies or detachments; the junction of paths. [1913 Webster]

2.  The place or point of union, meeting, or junction; specifically, the place where two or more lines of railway meet or cross. [1913 Webster]

junction, n.
1 a point at which two or more things are joined.
2 a place where two or more railway lines or roads meet, unite, or cross.
3 the act or an instance of joining.
4 Electronics a region of transition in a semiconductor between regions where conduction is mainly by electrons and regions where it is mainly by holes.

Idiom:
junction box a box containing a junction of electric cables etc.

Etymology:
L junctio (as JOIN)

N  addition, annexation, adjection, junction, superposition, superaddition, superjunction, superfetation, accession, reinforcement, increase, increment, supplement, accompaniment, interposition, insertion, added, additional, supplemental, supplementary, suppletory, subjunctive, adjectitious, adscititious, ascititious, additive, extra, accessory, au reste, in addition, more, plus, extra, and, also, likewise, too, furthermore, further, item, and also, and eke, else, besides, to boot, et cetera, and so on, and so forth, into the bargain, cum multis aliis, over and above, moreover, with, withal, including, inclusive, as well as, not to mention, let alone, together with, along with, coupled with, in conjunction with, conjointly, jointly, adde parvum parvo magnus acervus erit.

N  mixture, admixture, commixture, commixtion, commixion, intermixture, alloyage, matrimony, junction, combination, miscegenation, impregnation, infusion, diffusion suffusion, transfusion, infiltration, seasoning, sprinkling, interlarding, interpolation, adulteration, sophistication, tinge, tincture, touch, dash, smack, sprinkling, spice, seasoning, infusion, soupcon, alloy, amalgam, brass, chowchow, pewter, magma, half-and-half, melange, tertium quid, miscellany, ambigu, medley, mess, hotchpot, pasticcio, patchwork, odds and ends, all sorts, jumble, salad, sauce, mash, omnium gatherum, gallimaufry, olla-podrida, olio, salmagundi, potpourri, Noah's ark, caldron texture, mingled yarn, mosaic, half-blood, half-caste, mulatto, terceron, quarteron, quinteron, quadroon, octoroon, griffo, zambo, cafuzo, Eurasian, fustee, fustie, griffe, ladino, marabou, mestee, mestizo, quintroon, sacatra zebrule, catalo, cross, hybrid, mongrel, mixed, implex, composite, half-and-half, linsey-woolsey, chowchow, hybrid, mongrel, heterogeneous, motley, miscellaneous, promiscuous, indiscriminate, miscible, among, amongst, amid, amidst, with, in the midst of, in the crowd.

N  junction, joining, joinder, union connection, conjunction, conjugation, annexion, annexation, annexment, astriction, attachment, compagination, vincture, ligation, alligation, accouplement, marriage infibulation, inosculation, symphysis, anastomosis, confluence, communication, concatenation, meeting, reunion, assemblage, coition, copulation, sex, sexual congress, sexual conjunction, sexual intercourse, love-making, joint, joining, juncture, pivot, hinge, articulation, commissure, seam, gore, gusset, suture, stitch, link, miter mortise, closeness, tightness coherence, combination, annexationist, joined, joint, conjoint, conjunct, corporate, compact, hand in hand, firm, fast, close, tight, taut, taught, secure, set, intervolved, inseparable, indissoluble, insecable, severable, jointly, in conjunction with, fast, firmly intimately, tria juncta in uno.

N  connection, vinculum, link, connective, connection, junction, bond of union, copula, hyphen, intermedium, bracket, bridge, stepping-stone, isthmus, bond, tendon, tendril, fiber, cord, cordage, riband, ribbon, rope, guy, cable, line, halser, hawser, painter, moorings, wire, chain, string, fastener, fastening, tie, ligament, ligature, strap, tackle, rigging, standing rigging, running rigging, traces, harness, yoke, band ribband, bandage, brace, roller, fillet, inkle, with, withe, withy, thong, braid, girder, tiebeam, girth, girdle, cestus, garter, halter, noose, lasso, surcingle, knot, running knot, cabestro, cinch, lariat, legadero, oxreim, suspenders, pin, corking pin, nail, brad, tack, skewer, staple, corrugated fastener, clamp, U-clamp, C-clamp, cramp, cramp iron, ratchet, detent, larigo, pawl, terret, treenail, screw, button, buckle, clasp, hasp, hinge, hank, catch, latch, bolt, latchet, tag, tooth, hook, hook and eye, lock, holdfast, padlock, rivet, anchor, grappling iron, trennel, stake, post, cement, glue, gum, paste, size, wafer, solder, lute, putty, birdlime, mortar, stucco, plaster, grout, viscum, shackle, rein, prop.

N  combination, mixture, junction, union, unification, synthesis, incorporation, amalgamation, embodiment, coalescence, crasis, fusion, blending, absorption, centralization, alloy, compound, amalgam, composition, tertium quid, resultant, impregnation, combined, impregnated with, ingrained, imbued inoculated.

disease of the neuromuscular junction, esophagogastric junction, junction barrier, junction box, junction rectifier, junction transistor, myoneural junction, neuromuscular junction, oesophagogastric junction, p-n junction, railway junction, spaghetti junction, thermocouple junction