• IPA: /ˌpɛ.səˈmɪs.tɪk/


  1. Marked by pessimism and little hopefulness; expecting the worst.
    a pessimistic view of the future
  2. Pertaining to the worst-case scenario.
    a pessimistic estimate
  3. (computing) Taking out exclusive locks on data to prevent conflicts with other processes that might modify it.
    pessimistic concurrency; pessimistic locking
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