/ 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. Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language