D defs.my
Entry 2 senses Webster, 1913

Exacerbation

/(ĕgz*ăs`ẽr*bā"shŭn)/ · Ex·ac·er·ba·tion · IPA /ɪɡˈzæsɚˌbeɪʃən/
01 n. The act of rendering more violent or bitter; the state of being exacerbated or intensified in violence or malignity; as, exacerbation of passion.
  1. 1.
    The act of rendering more violent or bitter; the state of being exacerbated or intensified in violence or malignity; as, exacerbation of passion.
  2. 2.
    A periodical increase of violence in a disease, as in remittent or continuous fever; an increased energy of diseased and painful action.(Med.)