
1) Approaching the third quarter 2) Declining 3) Decreasing in intensity 4) Diminishing 5) Disappearing 6) In decline 7) Like a last-quarter moon 8) Like some moons 9) On the decline 10) On the way out 11) Petering out 12) Vanishing 13) Weakening
Found on
https://www.crosswordclues.com/clue/waning

1) Declining 2) Deteriorating 3) Deterioration 4) Ebbing 5) Weakening
Found on
https://www.crosswordclues.com/clue/waning

- a gradual decrease in magnitude or extent
- grow smaller
- become smaller
- decrease in phase
Found on

• (n.) The act or process of waning, or decreasing. • (p. pr. & vb. n.) of Wane
Found on
http://thinkexist.com/dictionary/meaning/waning/
Wan'ing noun The act or process of waning, or decreasing. « This earthly moon, the Church, hath fulls and
wanings , and sometimes her eclipses.»
Bp. Hall. Found on
http://www.encyclo.co.uk/webster/W/6

The changing illumination of the Moon (or other body) over time. The Moon waxes, growing more illuminated, between its new and full phases, and wanes, becoming less illuminated, between its full and new phases.
Found on
http://www.skyandtelescope.com/astronomy-terms/

[
adj] - (of the moon) `after full moon comes the waning moon` 2. [n] - a gradual decrease in magnitude or extent
Found on
http://www.webdictionary.co.uk/definition.php?query=waning

wane, waning, waned 1. Lose size; become smaller gradually. 2. Decline in power, influence, or importance. 3. Decline in strength or intensity. 4. Draw to a close. 5. On the wane, growing less; waning. Although wane is from Old English and Old Frisian and not from Latin nor Greek, it is included here because it is considered a synonym of decre...
Found on
http://www.wordinfo.info/words/index/info/view_unit/567/2
adjective (of the moon) pertaining to the period during which the visible surface of the moon decreases; `after full moon comes the waning moon`
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.