/ Dictionary / Index P protective system: Meaning and Definition of Find definitions for: protec'tive sys"tem Pronunciation: [key] — Econ. Econ. protectionism (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. protective slope protector Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language