Spam Definition

spăm

spammed, spamming, spams

noun

Unsolicited e-mail, often advertisements, sent out over a computer network to many addresses, usually indiscriminately.

Webster's New World

A single piece of such e-mail.

American Heritage

Synonyms:

verb

To send such e-mail to (a user or users)

Webster's New World

To send (a message) indiscriminately to multiple mailing lists, individuals, or newsgroups.

American Heritage

pronoun

Tinned meat made mainly from ham by Hormel Foods Corporation.

Wiktionary

Other Word Forms of Spam

Singular:

spam

Plural:

From Spam (probably inspired by a comedy routine on the British television series Monty Python's Flying Circus, in which the word is repeated incessantly)

From American Heritage Dictionary of the English Language, 5th Edition
Blend of spiced and ham

From Wiktionary