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Noun: derangement  di'reynj-munt
  1. A state of mental disturbance and disorientation
    - mental unsoundness, unbalance
  2. The act of disturbing the mind or body
    "his carelessness could have caused an ecological derangement";
    - upset, overthrow

Derived forms: derangements

Type of: craziness [informal], disturbance, insanity, madness

Encyclopedia: Derangement