WordReference Random House Unabridged Dictionary of American English © 2020
bulk mail, 
  • 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  (bulkmāl′),USA pronunciation v.t. 
    1. to mail as bulk mail.

    'bulk mail' also found in these entries:

    Report an inappropriate ad.