open

open [adj1] unfastened, unclosed accessible, agape, airy, ajar, bare, clear, cleared, dehiscent, disclosed, emptied, expanded, expansive, exposed, extended, extensive, free, gaping, made passable, naked, navigable, passable, patent, patulous, peeled, removed, rent, revealed, ringent, rolling, spacious, spread out, stripped, susceptible, unbarred, unblocked, unbolted, unburdened, uncluttered, uncovered, unfolded, unfurled, unimpeded, unlocked, unobstructed, unplugged, unsealed, unshut, unstopped, vacated, wide, yawning; concepts 485,576 —Ant. closed, fastened, locked, shut open [adj2] accessible; not forbidden admissible, agreeable, allowable, approachable, appropriate, attainable, available, employable, fit, free, general, getable*, nondiscriminatory, not posted, obtainable, on deck*, on tap*, open-door*, operative, permitted, practicable, proper, public, reachable, securable, suitable, to be had*, unconditional, unoccupied, unqualified, unrestricted, usable, vacant, welcoming, within reach; concepts 560,576 —Ant. blocked, closed, inaccessible, obstructed, shut, unavailable open [adj3] clear, obvious apparent, avowed, barefaced, blatant, conspicuous, downright, evident, flagrant, frank, manifest, noticeable, overt, plain, unconcealed, undisguised, visible, well-known; concepts 267,535 —Ant. ambiguous, closed, deceitful, unclear, vague open [adj4] undecided ambiguous, arguable, controversial, debatable, doubtful, dubious, dubitable, equivocal, indecisive, in question, moot, problematic, questionable, uncertain, unresolved, unsettled, up for discussion*, up in the air*, yet to be decided*; concepts 267,529 —Ant. certain, decided, definite, sure open [adj5] honest, objective artless, candid, disinterested, fair, frank, free, guileless, impartial, ingenuous, innocent, lay it on the line*, mellow, natural, objective, on the level*, openand-shut*, openhearted*, plain, receptive, sincere, straightforward, talking turkey*, transparent, unbiased, uncommitted, unconcealed, undisguised, undissembled, unprejudiced, unreserved, up-front*; concepts 267,542 —Ant. deceitful, deceptive, dishonest, lying, shifty, subjective open [v1] begin begin business, bow, commence, convene, embark, get things rolling*, inaugurate, initiate, jump, kick off, launch, meet, raise the curtain*, ring in*, set in motion, set up shop*, sit, start, start the ball rolling*; concept 221 —Ant. close, conclude, end, finish, shut open [v2] clear, expose; spread bare, break in, break out, broach, burst, bust in, come apart, crack, disclose, display, disrupt, expand, fissure, free, gap, gape, hole, jimmy, kick in, lacerate, lance, penetrate, perforate, pierce, pop, puncture, release, reveal, rupture, separate, sever, slit, slot, split, tap, throw wide, unbar, unblock, unbolt, unclose, unclothe, uncork, uncover, undo, unfasten, unfold, unfurl, unlatch, unlock, unroll, unseal, unshut, unstop, untie, unwrap, vent, ventilate, yawn, yawp; concepts 135,250,469 —Ant. block, bury, cover, exclude, hide, hinder, shut