/ Dictionary / Index P proliferate: Meaning and Definition of Find definitions for: pro•lif•er•ate Pronunciation: (pru-lif'u-rāt"), [key] — -at•ed, -at•ing. to grow or produce by multiplication of parts, as in budding or cell division, or by procreation. to increase in number or spread rapidly and often excessively. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: proliferate (Thesaurus) pro-life proliferation Related Content Daily Word Quiz: miscreant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language