/ Dictionary / Index O officinal: Meaning and Definition of Find definitions for: of•fic•i•nal Pronunciation: (u-fis'u-nl), [key] — adj. kept in stock by apothecaries, as a drug. Cf.(def. 1). recognized by a pharmacopoeia. —n. an officinal medicine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. officiate officious Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language