The Oxford Thesaurus An A-Z Dictionary of Synonyms - wanev.

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.