noun

• (literary) The end of a period.
  "The day was in its prime, the day was in its wane, and still, uneasy in mind and body, she slept on."
• (woodworking) A rounded corner caused by lack of wood, often showing bark.
  "2002, Peter Ross, Appraisal and Repair of Timber Structures, p. 11, Sapwood, or even bark, may appear on the corners, or may have been cut off, resulting in wane, or missing timber."

verb

• (intransitive) To progressively lose its splendor, value, ardor, power, intensity etc.; to decline.
  "You saw but sorrow in its waning form."
• (intransitive) For light to dim or diminish in strength.
  "The skies may hold not the splendour of sundown fast; / It wanes into twilight as dawn dies down into day."
• (intransitive, astronomy) For the Moon to pass through the phases of its monthly cycle where its surface is less and less visible.
  "The fall of Jack, and the subsequent fall of Jill, simply represent the vanishing of one moon-spot after another, as the moon wanes."
• (intransitive) Said of a time period that comes to an end.
  "Fast as autumn days toward winter: yet it seems//Here that autumn wanes not, here that woods and streams"

noun

• (Scotland, slang) A child.

noun

• (chiefly Northern England and Scotland, obsolete) A house or dwelling.