/ Dictionary / Index E ed: Meaning and Definition of Find definitions for: ed Pronunciation: (ed), [key] education: a course in driver's ed; adult ed. Ed Pronunciation: (ed), [key] a male given name, form ofor ED Pronunciation: [key] See ED50 Pronunciation: [key] effective dose for 50 percent of the group; the amount of a drug that is therapeutic in 50 percent of the persons or animals in which it is tested. -ed Pronunciation: [key] a suffix forming the past tense of weak verbs: he crossed the river. -ed Pronunciation: [key] a suffix forming the past participle of weak verbs (he had crossed the river), and of participial adjectives indicating a condition or quality resulting from the action of the verb (inflated balloons). -ed Pronunciation: [key] a suffix forming adjectives from nouns: bearded; monied; tender-hearted. ed. Pronunciation: [key] — pl. eds. pl. eds. edited. edition. editor. education. E.D. Pronunciation: [key] Eastern Department. election district. ex dividend. executive director. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ed (Thesaurus) eczema Eda Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language