Definition of in extremis adverb from the Oxford Advanced Learner's Dictionary

     

    in extremis

     adverb
    adverb
    BrE BrE//ˌɪn ɪkˈstriːmɪs//
     
    ; NAmE NAmE//ˌɪn ɪkˈstriːmɪs//
     
    (from Latin, formal)
     
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  1. 1in a very difficult situation when very strong action is needed
  2. 2at the moment of death
  3. Word OriginLatin, from in ‘in’ + extremis, ablative plural of extremus ‘outermost’.
See the Oxford Advanced American Dictionary entry: in extremis