Definition of: wane

(wān) v.i. waned, wan·ing
1. To diminish in size and brilliance: opposed to wax.
2. To decline or decrease gradually; draw to an end.
—noun
1. Decrease, as of power, prosperity, or reputation.
2. The decrease of the moon's visible illuminated surface; also, the period of such decrease.
3. The beveled edge of a board sawn from a log; also, the bark or defective portion on the edge or corner of a board. ♦ Homophone: wain. [OE wanian lessen]