A deep crevice or fissure, as in embankment; one of the clefts or fissure by which the mass of a glacier is divided. [1913 Webster]
A breach in the levee or embankment of a river, caused by the pressure of the water, as on the lower Mississippi. [1913 Webster]

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OXFORD DICTIONARY

crevasse, n.
1 a deep open crack, esp. in a glacier.
2 US a breach in a river levee.

Etymology

F f. OF crevace: see CREVICE

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THESAURUS

crevasse

abysm, abyss, arroyo, box canyon, breach, break, chap, chasm, check, chimney, chink, cleft, cleuch, clough, col, coulee, couloir, crack, cranny, crater, crevice, cut, cwm, deep, defile, dell, depth, dike, ditch, donga, draw, excavation, fault, fissure, flaw, flume, fracture, furrow, gap, gape, gash, gorge, groove, gulch, gulf, gully, hole, hollow, incision, joint, kloof, leak, moat, notch, nullah, opening, pass, passage, pit, ravine, rent, rift, rime, rupture, scissure, seam, shaft, slit, slot, split, trench, valley, void, wadi, well, yawning abyss

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ROGET THESAURUS

crevasse

Interval

N interval, interspace, separation, break, gap, opening, hole, 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, abra, barranca, barranco, clove, gulch, notch, yawning gulf, hiatus maxime, hiatus valde deflendus, parenthesis, void, incompleteness, period, interim (time), with an interval, far between, breachy, rimose, rimulose, at intervals, longo intervallo.

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