||Cre`vasse" (kr?`v?s"), n. [F. See Crevice.] 1. A deep crevice or fissure, as in embankment; one of the clefts or fissure by which the mass of a glacier is divided.

2. A breach in the levee or embankment of a river, caused by the pressure of the water, as on the lower Mississippi. [U.S.]

• a crack or fissure in a glacier or snow field; a chasm