/ Dictionary / Index E expo: Meaning and Definition of Find definitions for: ex•po Pronunciation: (ek'spō) [key] — pl. -pos. a world's fair or international exposition: Expo '67 in Montreal. any exhibition or show: an annual computer expo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: expo (Thesaurus) explosive welding exponent Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language