/ Dictionary / Index A allied: Meaning and Definition of Find definitions for: al•lied Pronunciation: (u-līd', al'īd), [key] — adj. joined by treaty, agreement, or common cause: allied nations. related; kindred: allied species. (cap.) of or pertaining to the Allies. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: allied (Thesaurus) Alliance for Progress Allier Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language