/ Dictionary / Index P preventive law: Meaning and Definition of Find definitions for: preven'tive law' Pronunciation: [key] — Law. Law. consultation, as between lawyer and client, to prevent future litigation by dispensing legal advice, clarifying the terms of a contract, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. preventive detention preventive medicine 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