/ Dictionary / Index F fentanyl: Meaning and Definition of Find definitions for: fen•ta•nyl Pronunciation: (fen'tu-nil), [key] — n. Pharm. a synthetic, short-acting narcotic analgesic and sedative, CHNO, used in combination with other drugs in anesthesia and in neuroleptanalgesia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fentanyl (Thesaurus) fenster fenugreek Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language