/ Dictionary / Index Z zone defense: Meaning and Definition of Find definitions for: zone' defense" Pronunciation: [key] — Sports. Sports. a method of defense, esp. in basketball and football, in which each member of the defensive team guards a specified portion of the playing area. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. zone zone line Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language