cleft

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. A past tense and a past participle of cleave¹.
2. adj. Divided; split.
3. adj. Botany Having indentations that extend about halfway to the center, as in certain leaves.
4. n. A crack, crevice, or split.
5. n. A split or indentation between two parts, as of the chin.

Century Dictionary and Cyclopedia

1. n. A space or opening made by cleavage; a crevice; a fissure; a furrow; a rift; a chink.
2. n. . The point where the legs are joined to the body; the crotch.
3. n. 3. That which is cloven; a cloven hoof.
4. n. A disease of horses characterized by a crack on the bend of the pastern.
5. n. A piece made by splitting: as, a cleft of wood.
6. n. Preterit and past participle of cleave.
7. Split; divided; cloven.
8. In botany, divided half-way down or somewhat further, with narrow or acute sinuses between the lobes: applied to a lobed leaf, calyx, etc.

Wiktionary

1. n. An opening, fissure, or V-shaped indentation made by or as if by splitting.
2. n. A piece made by splitting.
3. n. A disease of horses; a crack on the band of the pastern.
4. v. Simple past tense and past participle of cleave.

GNU Webster's 1913

1. imp. & p. p. from cleave.
2. adj. Divided; split; partly divided or split.
3. adj. (Bot.) Incised nearly to the midrib.
4. n. A space or opening made by splitting; a crack; a crevice.
5. n. A piece made by splitting.
6. n. (Far.) A disease in horses; a crack on the band of the pastern.

WordNet 3.0

1. n. a split or indentation in something (as the palate or chin)
2. adj. having one or more incisions reaching nearly to the midrib
3. n. a long narrow opening