/ Dictionary / Index A aggrade: Meaning and Definition of Find definitions for: ag•grade Pronunciation: (u-grād'), [key] — -grad•ed, -grad•ing. to raise the grade or level of (a river valley, a stream bed, etc.) by depositing detritus, sediment, or the like. Cf. degrade. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aggrade (Thesaurus) agglutinogen aggrandize Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language