Hypertext Webster Gateway: "crevasse"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Crevasse \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.]
From WordNet (r) 1.7 (wn)
crevasse
n : a deep fissure
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