Definition of organism noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈɔːɡənɪzəm//
    ; NAmE NAmE//ˈɔːrɡənɪzəm//
    Cell biology
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  1. 1(biology or formal) a living thing, especially one that is extremely small Even the simplest, single-celled organisms show examples of this behaviour. The cell is the unit of which all living organisms are composed. see also microorganism Wordfinderbiology, biotechnology, breed, cell, chromosome, DNA, gene, mutation, organism, protein See related entries: Cell biology
  2. 2(formal) a system consisting of parts that depend on each other the social organism (= society)
  3. Word Originearly 18th cent. (in the sense ‘organization’, from organize): current senses derive from French organisme.
See the Oxford Advanced American Dictionary entry: organism