Barrier1. (n.) A carpentry obstruction, stockade, or other obstacle made in a passage in order to stop an enemy.
2. (n.) A fortress or fortified town, on the frontier of a country, commanding an avenue of approach.
3. (n.) A fence or railing to mark the limits of a place, or to keep back a crowd.
4. (n.) An any obstruction; anything which hinders approach or attack.
5. (n.) Any limit or boundary; a line of separation.
Thesaurus Entries
abatis, advanced work, arch dam, backstop, balistraria, balustrade, bamboo curtain, bank, banquette, bar, barbed-wire entanglement, barbican, barrage, barricade, bartizan, bastion, battlement, bear-trap dam, beaver dam, blank wall, blind alley, blind gut, block, blockade, blockage, bolt, boom, bottleneck, boundary, brattice, breakwater, breastwork, brick wall, buffer, buffer state, bulkhead, bulwark, bumper, casemate, cecum, cheval-de-frise, choking, choking off, circumvallation, clog, cloison, cofferdam, collision mat, congestion, constipation, contravallation, costiveness, counterscarp, cul-de-sac, curtain, cushion, dam, dead end, defense, demibastion, diaphragm, dike, dissepiment, ditch, dividing line, dividing wall, division, drawbridge, earthwork, embankment, embolism, embolus, enclosure, entanglement, escarp, escarpment, fence, fender, fieldwork, fortalice, fortification, frontier, gate, glacis, gorge, gravity dam, groin, ha-ha, hindrance, hydraulic-fill dam, impasse, impediment, infarct, infarction, interseptum, iron curtain, jam, jetty, leaping weir, levee, limit, lock, logjam, loophole, lunette, machicolation, mantelet, mat, merlon, midriff, midsection, milldam, moat, mole, mound, obstacle, obstipation, obstruction, outwork, pad, padlock, palisade, panel, parados, parapet, paries, partition, party wall, portcullis, postern gate, property line, rail, railing, rampart, ravelin, redan, redoubt, roadblock, rock-fill dam, sally port, scarp, sconce, sealing off, seawall, separation, septulum, septum, shock pad, shutter dam, stockade, stone wall, stop, stoppage, strangulation, tenaille, vallation, vallum, wall, weir, wicket dam, work