/ Dictionary / Index T thrive: Meaning and Definition of Find definitions for: thrive Pronunciation: (thrīv), [key] — thrived throve, thrived thriv•en thriv•ing. to prosper; be fortunate or successful. to grow or develop vigorously; flourish: The children thrived in the country. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thrive (Thesaurus) thrips thro Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language