/ Dictionary / Index D decertify: Meaning and Definition of Find definitions for: de•cer•ti•fy Pronunciation: (dē-sûr'tu-fī"), [key] — -fied, -fy•ing. to withdraw certification from. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: decertify (Thesaurus) decern dechlorinate 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