/ Dictionary / Index P PTSD: Meaning and Definition of Find definitions for: PTSD Pronunciation: [key] posttraumatic stress disorder. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ptsd (Thesaurus) pts. PTT Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language