/ Dictionary / Index A ASEAN: Meaning and Definition of Find definitions for: ASEAN Pronunciation: [key] Association of Southeast Asian Nations. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: asean (Thesaurus) asea aseismic Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language