spam
noun [ U ]
IT uk/spæm/ usemails that are sent to people who do not want them, especially advertisements:
Not only is the stream of spam rising, but an increasing share of the messages contain viruses.
send/receive spam
Compare
junk mail
See also
anti-spam
spam
verb [ T ]
IT uk/spæm/ us-mm-to send someone an advertisement that they do not want by email:
He spammed the message to 30,000 addresses in a week.