1. (v. i.) To be diminished; to decline; to decrease; -- contrasted with wax, applied to moon phases.

2. (v. i.) To decline; to fail; to sink.

3. (v. t.) To cause to decrease.

4. (n.) The decrease of the illuminated part of the moon to the eye of a spectator.

5. (n.) Decline; failure; diminution; decrease; declension.

6. (n.) An inequality in a board.