Definition of gradual adjective from the Oxford Advanced American Dictionary

      

    gradual

     adjective
    adjective
    NAmE//ˈɡrædʒuəl//
     
     
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  1. 1happening slowly over a long period; not sudden a gradual change in the climate Recovery from the disease is very gradual. opposite sudden
  2. 2(of a slope) not steep
See the Oxford Advanced Learner's Dictionary entry: gradual