\Wan"ion\, 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.