/ Dictionary / Index B bulk mail: Meaning and Definition of Find definitions for: bulk' mail' Pronunciation: [key] a category of mail for mailing large numbers of identical printed items to individual addressees at less than first-class rates, as circulars or bulletins. bulk-mail Pronunciation: (bulk'māl"), [key] — v.t. to mail as bulk mail. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bulkheading bulk modulus 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