/ Dictionary / Index B btry.: Meaning and Definition of Find definitions for: btry. Pronunciation: [key] battery. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. btl. B.T.U. Related Content Daily Word Quiz: miscreant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language