/ Dictionary / Index D decl.: Meaning and Definition of Find definitions for: decl. Pronunciation: [key] declension. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. deck watch declaim Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language