/ Dictionary / Index I ibuprofen: Meaning and Definition of Find definitions for: i•bu•pro•fen Pronunciation: (ī"by-prō'fun, ī-by'prō-fen"), [key] — n. Pharm. a white powder, CHO, used esp. in the treatment of rheumatoid arthritis and osteoarthritis as an anti-inflammatory, analgesic, and antipyretic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ibuprofen (Thesaurus) I.B.T.C.W.H. Ibycus 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