/ Dictionary / Index P posttraumatic: Meaning and Definition of Find definitions for: post•trau•mat•ic Pronunciation: (pōst"tru-mat'ik, -trô-, -trou-), [key] — adj. occurring after physical or psychological trauma. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. posttranslational posttraumatic stress disorder Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language