/ Dictionary / Index B BLT: Meaning and Definition of Find definitions for: BLT Pronunciation: [key] — pl. BLTs. a bacon, lettuce, and tomato sandwich. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: blt (Thesaurus) BLS blub 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