n. A crack; a cleft; a fissure; a rent; a narrow opening of some length, as between two parts of a solid surface, or between two adjoining surfaces: as, a crevice in a wall, rock, etc.n. Specifically, in lead-mining, in the Mississippi valley, a fissure in which the ore of lead occurs.To make crevices in; crack; flaw.To channel; ornament with crevices.n. An obsolete form of crawfish.