having or characterized by financial success or good fortune; flourishing; successful: a prosperous business.
well-to-do or well-off: a prosperous family.
favorable or propitious.

Origin of prosperous

1400–50; late Middle English < Latin prosperus
Related formspros·per·ous·ly, adverbpros·per·ous·ness, nounnon·pros·per·ous, adjectivenon·pros·per·ous·ly, adverbnon·pros·per·ous·ness, nouno·ver·pros·per·ous, adjectiveo·ver·pros·per·ous·ly, adverbo·ver·pros·per·ous·ness, nounpseu·do·pros·per·ous, adjectivepseu·do·pros·per·ous·ly, adverbqua·si-pros·per·ous, adjectivequa·si-pros·per·ous·ly, adverbsu·per·pros·per·ous, adjectiveun·pros·per·ous, adjectiveun·pros·per·ous·ly, adverbun·pros·per·ous·ness, noun

Synonyms for prosperous

1. thriving. 2. wealthy, rich. 3. fortunate, lucky, auspicious. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for unprosperous



flourishing; prospering
rich; affluent; wealthy
favourable or promising
Derived Formsprosperously, adverbprosperousness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for unprosperous



early 15c., "tending to bring success," from prosper + -ous, or else from obsolete Middle French prospereus (15c.), from prosperer. The sense of "flourishing" is first recorded late 15c.

Online Etymology Dictionary, © 2010 Douglas Harper