/ Dictionary / Index E effectual: Meaning and Definition of Find definitions for: ef•fec•tu•al Pronunciation: (i-fek'ch-ul), [key] — adj. producing or capable of producing an intended effect; adequate. valid or binding, as an agreement or document. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: effectual (Thesaurus) effects effectuate Related Content Daily Word Quiz: acme Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language