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]
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 plate (Boilers), a covering or break-join plate riveted to and uniting the edges of sheets which make a butt joint. -- Junction rails (Railroads), the switch, or movable, rails, connecting one line of track with another.

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OXFORD DICTIONARY

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)

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THESAURUS

junction

Anschluss, L, abutment, abuttal, access, accession, accompaniment, accord, accordance, accretion, addition, adherence, adhesion, adjacency, adjoiningness, adjunct, adjunction, affairs, affiliation, affinity, affixation, agglomeration, agglutination, aggregation, agreement, aisle, alley, alliance, amalgamation, ambulatory, annexation, aperture, apposition, approximation, appulse, arcade, artery, articulation, assemblage, assembly, assimilation, association, attachment, augmentation, avenue, blend, blending, bond, bracketing, branch, building, buildup, cabal, cable railway, cahoots, call-up, canvass, cartel, census, centralization, channel, cling, clinging, cloister, closeness, clotting, clustering, co-working, coaction, coagulation, coalescence, coalition, cog railway, coherence, cohesion, cohesiveness, coincidence, collaboration, collection, collectivity, colligation, collocation, collusion, colonnade, combination, combine, combined effort, combo, communication, compaction, comparison, composition, compound, concatenation, concert, concerted action, concomitance, concordance, concourse, concretion, concurrence, condensation, conduit, confederacy, confederation, confluence, conflux, congealment, congelation, congeries, conglobation, conglomeration, congregation, conjoining, conjugation, conjunction, connectedness, connection, consilience, consolidation, conspiracy, constitution, construction, conterminousness, contiguity, contrariety, convergence, cooperation, copulation, corralling, correspondence, corridor, coterminousness, coupling, covered way, crossroads, data-gathering, dealings, deduction, defile, disjunction, ecumenism, el, electric railway, elevated, elevated railway, embankment, embodiment, encompassment, enosis, exit, fabrication, fashioning, federalization, federation, feeder, feeder line, ferry, filiation, ford, formation, fusion, gallery, gathering, getup, gravity-operated railway, homology, hookup, horse railway, inclusion, incorporation, increase, ingathering, inlet, inseparability, integration, interchange, intercommunication, intercourse, interlinking, intersection, intimacy, inventory, joinder, joining, jointure, junction, juncture, junta, juxtaposition, knotting, lane, league, liaison, light railroad, line, link, linkage, linking, main line, make, makeup, marriage, meeting, meld, melding, merger, merging, metro, mixture, mobilization, monorail, muster, mutual attraction, nearness, opening, organization, outlet, overpass, package, package deal, pairing, parasitism, pass, passage, passageway, perigee, perihelion, piecing together, portico, prefixation, propinquity, proximity, putting together, rack railway, rack-and-pinion railway, rail, rail line, railroad, railroad tunnel, railway, rapport, reinforcement, relatedness, relation, relations, relationship, roadbed, roadway, rodeo, roundup, saprophytism, seam, set, setup, shaping, sidetrack, siding, similarity, simultaneity, solidification, splice, sticking, street railway, streetcar line, structure, structuring, subway, suffixation, superaddition, superfetation, superjunction, superposition, supplementation, survey, switchback, symbiosis, sympathy, synchronism, syncretism, syndication, syneresis, synergy, synthesis, syzygy, terminal, terminus, tie, tie-in, tie-up, track, traject, trajet, tram, tramline, trestle, trolley line, trunk, trunk line, tube, tunnel, turnout, underground, underpass, unification, union, united action, uniting, wedding, yoking

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ROGET THESAURUS

junction

Addition

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.

Mixture

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.

Junction

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.

Connection

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.

Combination

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.

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