/ Dictionary / Index E extra-base hit: Meaning and Definition of Find definitions for: ex'tra-base' hit' Pronunciation: (ek'stru-bās'), [key] — Baseball. Baseball. a base hit that enables a batter to reach more than one base safely, as a two-base hit, three-base hit, or home run. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. extra-atmospheric extrabold Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language