Meaning of posttraumatic stress disorder

post'traumat'ic stress' disor"der

Pronunciation: [key]
— Psychiatry. Psychiatry.
  1. a mental disorder, as battle fatigue, occurring after a traumatic event outside the range of usual human experience, and characterized by symptoms such as reliving the event, reduced involvement with others, and manifestations of autonomic arousal such as hyperalertness and exaggerated startle response. Abbr.: PTSD
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.