28. open up Slang,
a. open fire, being or start firing or shooting,
b. reveal oneself, let down one's defenses; speak out, vent one's emotions, get [s.t.] off one's chest, pour out one's heart to. c. (of a vehicle) give it gas, Inf gun or rev the engine; accelerate, speed up, speed.
open-ended, adj. unlimited, undefined, unconstricted, unrestricted, Inf. wide-open; broad, general, liberal; up in the air, indefinite, undetermined, unsettled, vague, fuzzy, indistinct.
opener, n. 1. start, starter, beginning, onset; introduction, inauguration, initiation.
2. can opener, Brit, tin opener, Fr. boite-ouvrir, corkscrew, bottle screw, bottle opener, Inf. church key; gadget, device.
3. preliminary, preliminary bout, SI. prelim; top of the inning, top of the first, starting game, kickoff; curtain raiser or lifter, overture, prologue, first act, preamble, first installment, preface; maiden speech, inaugural address; ice-breaker, introduction; appetizer, taster, first course.
open-eyed, adj. 1. wide-eyed, goggle-eyed, agog, agape; astonished, astounded, surprised, amazed; awed, impressed.
2. watchful, alert, vigilant, on the qui vive; attentive, observant, awake, with one's ear to the ground, heedful; all-eyes, hawk-eyed, eagle-eyed, sharp-eyed, Argus-eyed; wary, leery.
3. intentional, willful, deliberate, calculated; knowing, aware, conscious, witting, cognizant.
open-handed, adj. generous, liberal, free-handed, bounteous, bountiful, munificent, prodigal, giving, unstinting, unselfish; charitable, eleemosynary, humanitarian, philanthropic, altruistic; benevolent, beneficent, free-hearted, magnanimous, big-hearted, large-hearted.
open-hearted, adj. 1. candid, frank, forthright, straightforward, man-to-man, heart-to-heart; honest, sincere, ingenuous, guileless, naive, simple, innocent, genuine, natural; unreserved, unrestrained, unconstrained, unreticent, demonstrative, emotional, free and easy; free-spoken, free-speaking, outspoken, bold, blunt, abrupt, unchecked, bluff, tactless, brusque.
2. kindhearted, kind, kindly, goodhearted, good, benevolent; benign, benignant, soft-hearted, tenderhearted, tender, gentle, Fr. gentil, humane; warmhearted, compassionate, loving, warm sympathetic, Inf. Christian. See - kind (defs. 1, 2).
opening1, adj. initial, starting, beginning, commencing, introductory, prefatory, first.
opening2, n. 1. hiatus, lacuna, gap, slit, slot; hole, hollow, cavity, aperture, orifice, ostiole; interstice, areola, pore, Anat. sinus; peephole, buttonhole, pinhole, eye, eyelet; mouth, embochure, mouthhole, mouthpiece; breach, break, space, rift, rent; cleft, chasm, Archaic, scissure; crack, cranny, chink, crevice, fissure, notch, nick; cavern, cave, grotto, den; excavation, pit, well, shaft; hatch, gate, door, portal, window, scupper, vent.
2. beginning, start, commencement, inception, kick-off; birth, genesis, origin; dawn, dawning, threshold, outset, exordium; send-off, start-off, jump-off; overture, prologue, prelude, preliminary, proem, introduction, preface; debut, first step.
3. opportunity, chance, good chance, Inf. foot in the door, SI. break, SI. the breaks; SI. lucky shot, Lady Luck; fortuitousness, serendipity; sure bet, good thing, inside track.
4. vacancy, job opportunity, position or place available.
open-minded, adj. 1. receptive, open to suggestions, amenable, acquiescent, compliant; tolerant, for-bearant, catholic, latitudinarian, understanding, sym-