Definition of opportunistic adjective from the Oxford Advanced American Dictionary

     

    opportunistic

     adjective
    adjective
    NAmE//ˌɑpərtuˈnɪstɪk//
     
     
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  1. 1 (also opportunist) (disapproving) making use of an opportunity, especially to get an advantage for yourself; not done in a planned way an opportunistic crime The rookie marked his debut game with an opportunistic touchdown.
  2. 2[only before noun] (medical) harmful to people whose immune system has been made weak by disease or drugs an opportunistic infection
See the Oxford Advanced Learner's Dictionary entry: opportunistic