/ Dictionary / Index C certified: Meaning and Definition of Find definitions for: cer•ti•fied Pronunciation: (sûr'tu-fīd"), [key] — adj. having or proved by a certificate: a certified representative. guaranteed; reliably endorsed: a certified check. legally declared insane. committed to a mental institution. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: certified (Thesaurus) certification mark certified check Related Content Daily Word Quiz: laudable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language