An open or empty space in or between things:
— There was a small opening between the trees.

synonym: gap.

Roget 476: reasoning ratiocination rationalism; dialectics, induction, generalization.    discussion, comment; ventilation; inquiry etc. 461.    argumentation, controversy, debate; polemics, wrangling; contention etc. 720; logomachy^†; disputation, disceptation^†; paper war.    art of reasoning, logic.    process of reasoning, train of reasoning, chain of reasoning; deduction, induction, abduction; synthesis, analysis.    argument; case, plaidoyer^†, opening; lemma, proposition, terms, premises, postulate, data, starting point, principle; inference etc. (judgment) 480.    prosyllogism^†, syllogism; enthymeme^†, sorites^†, dilemma, perilepsis^†, a priori reasoning, reductio ad absurdum, horns of a dilemma, argumentum ad hominem [Lat.], comprehensive argument; empirema^†, epagoge^†.    [person who reasons] reasoner, logician, dialectician; disputant; controversialist, controvertist^†; wrangler, arguer, debater polemic, casuist, rationalist; scientist; eristic^†.    logical sequence; good case; correct just reasoning, sound reasoning, valid reasoning, cogent reasoning, logical reasoning, forcible reasoning, persuasive reasoning, persuasory reasoning^†, consectary reasoning^†, conclusive etc. 478; subtle reasoning; force of argument, strong point, strong argument, persuasive argument.    arguments, reasons, pros and cons.    ... show more

Roget 302: passage, transmission; permeation; penetration, interpenetration; transudation, infiltration; endosmose exosmose^†; endosmosis [Chem]; intercurrence^†; ingress etc. 294; egress etc. 295; path etc. 627; conduit etc. 350; opening etc. 260; journey etc. 266; voyage etc. 267.    ... show more

Roget 198: interval, interspace^†; separation etc. 44; break, gap, opening; hole etc. 260; chasm, hiatus, caesura; interruption, interregnum; interstice, lacuna, cleft, mesh, crevice, chink, rime, creek, cranny, crack, chap, slit, fissure, scissure^†, rift, flaw, breach, rent, gash, cut, leak, dike, ha-ha.    gorge, defile, ravine, canon, crevasse, abyss, abysm; gulf; inlet, frith^†, strait, gully; pass; furrow etc. 259; abra^†; barranca^†, barranco^†; clove [U.S.], gulch [U.S.], notch [U.S.]; yawning gulf; hiatus maxime [Lat.], hiatus valde deflendus [Lat.]; parenthesis etc. (interjacence) 228^†; void etc. (absence) 187; incompleteness etc. 53.    [interval of time] period etc. 108; interim (time) 106.    ... show more

Roget 180: space, extension, extent, superficial extent, expanse, stretch, hyperspace; room, scope, range, field, way, expansion, compass, sweep, swing, spread.    dimension, length etc. 200; distance etc. 196; size etc. 192; volume; hypervolume.    latitude, play, leeway, purchase, tolerance, room for maneuver.    spare room, elbow room, house room; stowage, roomage^†, margin; opening, sphere, arena.    open space, free space; void etc. (absence) 187; waste; wildness, wilderness; moor, moorland; campagna^†.    abyss etc. (interval) 198; unlimited space; infinity etc. 105; world; ubiquity etc. (presence) 186; length and breadth of the land.    proportions, acreage; acres, acres and perches, roods and perches, hectares, square miles; square inches, square yards, square centimeters, square meters, yards (clothing) &c.; ares, arpents^†.    ... show more

Roget 134: timeliness, occasion, opportunity, opening, room; event (eventuality) 151; suitable season, proper season, suitable time, proper time; high time; opportuneness etc. adj.; tempestivity^†.    crisis, turn, juncture, conjuncture; crisis, turning point, given time.    nick of time; golden opportunity, well timed opportunity, fine opportunity, favorable opportunity, opening; clear stage, fair field; mollia tempora [Lat.]; fata Morgana [Lat.]; spare time etc. (leisure) 685.    ... show more

Dutch: tussenruimte
Polish: otwór

A ceremony accompanying the start of some enterprise.

Becoming open or being made open.

Dutch: opening, vacature
Polish: otwarcie

The first performance (as of a theatrical production):
— The opening received good critical reviews.

synonyms: curtain raising, opening night.

Dutch: opening

The act of opening something.

Polish: otwieranie

Opportunity especially for employment or promotion.

Dutch: vacature
Polish: otwarcie

The initial part of the introduction.

A possible alternative.

synonyms: possibility, possible action.

Dutch: mogelijkheid

An aperture or hole that opens into a bodily cavity.

synonyms: orifice, porta.

Roget 260: hole, foramen; puncture, perforation; fontanel^†; transforation^†; pinhole, keyhole, loophole, porthole, peephole, mousehole, pigeonhole; eye of a needle; eyelet; slot.    opening; aperture, apertness^†; hiation^†, yawning, oscitancy^†, dehiscence, patefaction^†, pandiculation^†; chasm etc. (interval) 198.    embrasure, window, casement; abatjour^†; light; sky light, fan light; lattice; bay window, bow window; oriel [Arch.]; dormer, lantern.    outlet, inlet; vent, vomitory; embouchure; orifice, mouth, sucker, muzzle, throat, gullet, weasand^†, wizen, nozzle; placket.    portal, porch, gate, ostiary^†, postern, wicket, trapdoor, hatch, door; arcade; cellarway^†, driveway, gateway, doorway, hatchway, gangway; lich gate^†.    way, path etc. 627; thoroughfare; channel; passage, passageway; tube, pipe; water pipe etc. 350; air pipe etc. 351; vessel, tubule, canal, gut, fistula; adjutage^†, ajutage^†; ostium^†; smokestack; chimney, flue, tap, funnel, gully, tunnel, main; mine, pit, adit^†, shaft; gallery.    alley, aisle, glade, vista.    bore, caliber; pore; blind orifice; fulgurite^†, thundertube^†.    porousness, porosity.    sieve, cullender^†, colander; cribble^†, riddle, screen; honeycomb.    apertion^†, perforation; piercing etc. v.; terebration^†, empalement^†, pertusion^†, puncture, acupuncture, penetration.    key etc. 631, opener, master key, password, combination, passe-partout.    ... show more

Roget 66: beginning, commencement, opening, outset, incipience, inception, inchoation^†; introduction etc. (precursor) 64; alpha, initial; inauguration, debut, le premier pas, embarcation [Fr.], rising of the curtain; maiden speech; outbreak, onset, brunt; initiative, move, first move; narrow end of the wedge, thin end of the wedge; fresh start, new departure.    origin etc. (cause) 153; source, rise; bud, germ etc. 153; egg, rudiment; genesis, primogenesis^†, birth, nativity, cradle, infancy; start, inception, creation, starting point etc. 293; dawn etc. (morning) 125; evolution.    title-page; head, heading; van etc. (front) 234; caption, fatihah^†.    entrance, entry; inlet, orifice, mouth, chops, lips, porch, portal, portico, propylon^†, door; gate, gateway; postern, wicket, threshold, vestibule; propylaeum^†; skirts, border etc. (edge) 231.    first stage, first blush, first glance, first impression, first sight.    rudiments, elements, outlines, grammar, alphabet, ABC.    ... show more

Dutch: opening, lichaamsopening

A vacant or unobstructed space that is man-made.

Dutch: opening
Polish: otwór

An entrance equipped with a hatch; especially a passageway between decks of a ship.

synonyms: hatchway, scuttle.

Dutch: luikopening, laadhoofd

A recognized sequence of moves at the beginning of a game of chess:
— He memorized all the important chess openings.

synonym: chess opening.

Polish: otwarcie szachowe, debiut

The first of a series of actions.

synonyms: first step, initiative, opening move.

Dutch: aanstichting, initiatief
Polish: zrobienie pierwszego kroku

First or beginning.

Roget 260: open; perforated etc. v.; perforate; wide open, ajar, unclosed, unstopped; oscitant^†, gaping, yawning; patent.    tubular, cannular^†, fistulous; pervious, permeable; foraminous^†; vesicular, vasicular^†; porous, follicular, cribriform^†, honeycombed, infundibular^†, riddled; tubulous^†, tubulated^†; piped, tubate^†.    opening etc. v.; aperient^†.    ... show more