Available Definitions:
1) n. - The act or process of waning, or decreasing.
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.