Definitions for wanion
the wane of the moon
Origin: Alteration of earlier waniand, from wanien, present participle of wanien (from the phrase "in the waniand [moon]", i.e. in the time of the waning moon, in an unlucky stound).
a word of uncertain signification, used only in the phrase with a wanion, apparently equivalent to with a vengeance, with a plague, or with misfortune