1. impostume - Noun
2. impostume - Verb
impostume (plural impostumes)
(obsolete) An abscess.
impostume (third-person singular simple present impostumes, present participle impostuming, simple past and past participle impostumed)
(obsolete) Alternative form of imposthume
I had a heavy heart and an ugly head, a kind of impostume in my head, which I was very desirous to be unladen of. Robert Burton