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Pronunciation: ă-gre′shŭn


  1. A domineering, forceful, or assaultive verbal or physical action intended to hurt another animal or person; the verbal or motor behavioral expression of the affects of anger, hostility, or rage.
  2. Invasive behavior, as of a pathogenic organism or disease process.

[L. aggressio, fr. aggredior, to accost, attack]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.