/ Dictionary / Index E extemporary: Meaning and Definition of Find definitions for: ex•tem•po•rar•y Pronunciation: (ik-stem'pu-rer"ē), [key] — adj. extemporaneous; extempore. sudden; unexpected. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: extemporary (Thesaurus) extemporaneous extempore Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language