v. 1 decrease, diminish, grow less, lessen, decline, die out, abate, ebb, subside, fade (away), dim, taper off, peter out, wind down, weaken The waning moon cast its pale light on the dying knight As his strength waned he could no longer lift his sword. 2 draw to a close, end, terminate The day waned into a gloomy evening
n. 3 decrease, diminution, lessening, decline, abatement, ebb, subsidence, fading, tapering off, petering out, winding down, weakening, deterioration, degeneration The 1970s saw the wane in popularity of large, gas-guzzling cars 4 on the wane. on the decrease or decline or ebb, diminishing, decreasing, declining, abating, subsiding, fading, tapering off, petering out, winding down, weakening, deteriorating, degenerating The economy is recovering, and inflation is on the wane Since that latest illness, my energy has been on the wane.