Definition of vigorous adjective from the Oxford Advanced Learner's Dictionary

     

    vigorous

     adjective
    adjective
    BrE BrE//ˈvɪɡərəs//
     
    ; NAmE NAmE//ˈvɪɡərəs//
     
    Energetic
     
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  1. 1very active, determined or full of energy synonym energetic a vigorous campaign against tax fraud a vigorous opponent of the government Take vigorous exercise for several hours a week. See related entries: Energetic
  2. 2strong and healthy a vigorous young man This plant is a vigorous grower.
  3. Word Origin Middle English: via Old French from medieval Latin vigorosus, from Latin vigor, from vigere ‘be lively’.Extra examples They are leading a very vigorous campaign to get the chairman removed. taking some quite vigorous exercise She was a vigorous opponent of the government. They conducted a vigorous campaign against tax fraud.
See the Oxford Advanced American Dictionary entry: vigorous