Becoming weaker or smaller. / Of the lunar phase: as it shrinks when viewed from the Earth.

The fact or act of becoming less or less intense or present; fading. / The fact or act of becoming smaller.

plural of waning

To progress cyclically through various phases. / To alternate; to increase and diminish in turn.

(astronomy) More than half full in phase, but growing smaller.

The moon when it appears smaller each night as it progresses from a full moon to a new moon.

plural of waning moon

A sharp or uneven edge on a board that is cut from a log not perfectly squared, or that is made in the process of squaring.

plural of waney

(archaic) third-person singular simple present indicative form of wane