/ Dictionary / Index A addenda: Meaning and Definition of Find definitions for: ad•den•da Pronunciation: (u-den'du), [key] — n. a pl. of a list of things to be added: The addenda in the back of the book runs to thirty pages. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: addenda (Thesaurus) addend addendum Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language