n. [ Probably for OE. waniand waning, p. pr. of wanien; hence, used of the waning of the moon, supposed to be an unlucky time. See Wane. ] 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. [ Obs. ] B. Jonson. Latimer. [ 1913 Webster ]