rift

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A narrow fissure in rock.
2. n. A break in friendly relations: a rift between siblings.
3. v. To split open; break.
4. v. To cause to split open or break.
5. n. A shallow area in a waterway.
6. n. The backwash of a wave that has broken upon a beach.

Century Dictionary and Cyclopedia

1. n. An opening made by riving or splitting; a fissure; a cleft or crevice; a chink.
2. n. A riving or splitting; a shattering.
3. To rive; cleave; split.
4. To make or effect by cleavage.
5. To burst open; split.
6. Split; specifically, following the general direction of the splitting or checking: said of a log: as, rift pine boards. Compare quartered, 4.
7. n. A veil; a curtain.
8. To belch.
9. n. A shallow place in a stream; a fording-place; also, rough water indicating submerged rocks.
10. n. In wood-working, a saw in which the cutting-teeth are placed at the ends of radial arms instead of upon the rim of a disk.
11. n. In geology, one of the principal cleavages or planes of weakness in building-stone, as quarried, of which the quarrymen take advantage. The two others, commonly occurring at right angles with it and with one another, are called the cut-off and the lift.

Wiktionary

1. n. A chasm or fissure.
2. n. A break in the clouds, fog, mist etc., which allows light through.
3. v. To form a rift.
4. v. obsolete except Scotland and northern UK To belch.

GNU Webster's 1913

1. p. p. of rive.
2. n. An opening made by riving or splitting; a cleft; a fissure.
3. n. A shallow place in a stream; a ford.
4. v. To cleave; to rive; to split
5. v. To burst open; to split.
6. v. Prov. Eng. & Scot. To belch.

WordNet 3.0

1. n. a narrow fissure in rock
2. n. a personal or social separation (as between opposing factions)
3. n. a gap between cloud masses