/ Dictionary / Index P proviso: Meaning and Definition of Find definitions for: pro•vi•so Pronunciation: (pru-vī'zō), [key] — pl. -sos, -soes. a clause in a statute, contract, or the like, by which a condition is introduced. a stipulation or condition. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: proviso (Thesaurus) provisional provisory 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