informal
: e-mail that is not wanted : e-mail that is sent to large numbers of people and that consists mostly of advertising
tips to reduce spam
a spam filter [=software that identifies and blocks spam]
spams; spammed; spamming
: to send unwanted e-mail to (someone)
That company keeps spamming me. [=keeps sending me spam]
Cite this Entry
“Spam.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/spam. Accessed 16 Apr. 2026.
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