- I(New American Roget's College Thesaurus)Shape like the inside of a sphere or circleNouns1. concavity, depression, dip, hollow, indentation, cavity, hole, dent, dint, dimple, follicle, pit, sinus alveolus; excavation, crater, pocket; trough, furrow, burrow; cup, basin, bowl (see receptacle); intaglio (see sculpture); coil; socket. See depth, interior.2. (concave thing) valley, vale, dale, dell, dingle, bottom, blade, gully, cave, cavern, cove; pothole, sinkhole, crater; armpit; grotto, grot; alcove; cul-de-sac; arch, bay, etc.3. (machine to make concave) excavator, sapper, miner, digger, [steam] shovel, spade, etc. (see receptacle).Verbs — cave in, depress, hollow, scoop [out], gouge, indent, dent, dint; excavate, mine, sap, undermine, burrow, tunnel; stave in.Adjectives — concave, depressed, hollow, pitted, stove in; retiring; retreating, cavernous; cellular, porous; spongy, honeycombed, alveolar; infundibular, funnel-shaped, cupular; bell-shaped, campaniform; capsular, vaulted, arched.Antonyms, see convexity.II(Roget's IV) n.Syn. depression, indentation, impression; see hole 2 .III(Roget's Thesaurus II) noun An area sunk below its surroundings: basin, depression, dip, hollow, pit1, sag, sink, sinkhole. See CONVEX.
English dictionary for students. 2013.