Unsolicited advertising or promotional material received through the mail and e-mail.
More example sentences
- Why is it legal to send junk mail via the post office, but if you send it by email it's suddenly illegal?
- In that world, senders have to pay to send mail: Paper junk mail has to have postage.
- Following an experiment to see just how much junk mail he received in a year, he produced a 70 lb mail mountain.
Definition of junk mail in:
- The British & World English dictionary