Breadcrumb Home > Dictionary > Index P personality disorder: Meaning and Definition of Find definitions for: personal'ity disor"der Pronunciation: [key] — Psychiatry. Psychiatry. any of a group of mental disorders characterized by deeply ingrained maladaptive patterns of behavior and personality style, which are usually recognizable as early as adolescence and are often lifelong in duration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. personality personality inventory TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: supertonic Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language