/ Dictionary / Index P protectant: Meaning and Definition of Find definitions for: pro•tect•ant Pronunciation: (pru-tek'tunt), [key] — n. a substance, as a chemical spray, that provides protection, as against insects, frost, rust, etc.; protective agent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. protect protectee Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language