/ Dictionary / Index A autism: Meaning and Definition of Find definitions for: au•tism Pronunciation: (ô'tiz-um), [key] — n. a pervasive developmental disorder of children, characterized by impaired communication, excessive rigidity, and emotional detachment. a tendency to view life in terms of one's own needs and desires. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: autism (Thesaurus) Auth. Ver. auto Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language