Breadcrumb Home > Dictionary > Index A aggro: Meaning and Definition of Find definitions for: ag•gro Pronunciation: (ag'rō), [key] — n. Brit. and Australian Informal. aggressiveness, esp. that of an urban youth gang or gang member. trouble; irritation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aggro (Thesaurus) aggrieved Agh. TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: derogate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language