Breadcrumb Home > Dictionary > Index A Anacostia: Meaning and Definition of Find definitions for: An•a•cos•ti•a Pronunciation: (an"u-kôs'tē-u, -kos'-), [key] — n. a section of the District of Columbia, in the SE part. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. anaconda Anacostia River ✖ Related Content Daily Word Quiz: derogate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language