junk mail
Unsolicited mail that the recipient is not interested in or does not want, often advertisements. Nothing exciting came today—just a few bills and some junk mail.
junk mail
annoying, unsolicited mail, such as promotional letters, etc. I am so incredibly tired of getting pound after pound of junk mail every day. I could just scream.
junk mail
Third-class mail, such as unsolicited advertisements and flyers, that is sent indiscriminately. For example, While we were on vacation the front hall filled up with junk mail. [c. 1950]