/ Dictionary / Index B B battery: Meaning and Definition of Find definitions for: B battery Pronunciation: [key] — Electronics. Electronics. an electric battery for supplying a constant, positive voltage to the plate of a vacuum tube. Cf. A battery, C battery. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. B.B.A. BBB 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