Definition of primeval adjective from the Oxford Advanced American Dictionary

     

    primeval

     adjective
    adjective
    NAmE//praɪˈmivl//
     
    [usually before noun]
     
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  1. 1from the earliest period of the history of the world; very ancient primeval forests primeval soup (= the mixture of gases and substances that is thought to have existed when the earth was formed and from which life started)
  2. 2(formal) (of a feeling or a desire) very strong and not based on reason, as if from the earliest period of human life primeval urges
See the Oxford Advanced Learner's Dictionary entry: primeval