• (British) IPA: /ˌɒptɪˈmɪstɪk/
  • (America) IPA: /ˌɑptɪˈmɪstɪk/


  1. Expecting the best in all possible ways.
    Antonyms: pessimistic
    in an optimistic mood
    optimistic plans
    took an optimistic view
  2. (computing) Allowing other processes to perform transactions on the same data at the same time, and checking for conflicts only when changes need to be written back.
    optimistic concurrency
    optimistic locking
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