/ Dictionary / Index P psychiatry: Meaning and Definition of Find definitions for: psy•chi•a•try Pronunciation: (si-kī'u-trē, sī-), [key] — n. the practice or science of diagnosing and treating mental disorders. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: psychiatry (Thesaurus) psychiatrist psychic Related Content Daily Word Quiz: designate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language