Definition of "impostume"

impostume

/ɪmˈpɒstjuːm/

noun
plural impostumes
1. (obsolete) An abscess.
  Quotations
  Jason Phereus [was] utterly forsaken of all Physitians, by reason of an impostume he had in his breast […].
  1603, Michel de Montaigne, translated by John Florio, The Essayes […], London: […] Val[entine] Simmes for Edward Blount […]
verb
third-person singular simple present impostumes, present participle impostuming, simple past and past participle impostumed
1. (obsolete) Alternative form of imposthume