/ Dictionary / Index E expeditious: Meaning and Definition of Find definitions for: ex•pe•di•tious Pronunciation: (ek"spi-dish'us), [key] — adj. characterized by promptness; quick: an expeditious answer to an inquiry. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: expeditious (Thesaurus) expeditionary expel Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language