/ Dictionary / Index P pure culture: Meaning and Definition of Find definitions for: pure' cul'ture Pronunciation: [key] the growth of only one microorganism in a culture. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. purebred pure democracy Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language