/ Dictionary / Index P paintbrush: Meaning and Definition of Find definitions for: paint•brush Pronunciation: (pānt'brush"), [key] a brush for applying paint, as one used in painting houses or one used in painting pictures. any plant of the genus Castilleja. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: paintbrush (Thesaurus) paint bridge painted Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language