from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Unsolicited e-mail, often of a commercial nature, sent indiscriminately to multiple mailing lists, individuals, or newsgroups; junk e-mail.
- transitive v. To send unsolicited e-mail to.
- transitive v. To send (a message) indiscriminately to multiple mailing lists, individuals, or newsgroups.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A collection of unsolicited bulk electronic messages.
- n. Any undesired electronic content automatically generated for commercial purposes.
- n. An unsolicited electronic message sent in bulk, usually by email or newsgroups.
- n. Alternative form of SPAM. (tinned meat product)
- v. To send spam (i.e. unsolicited electronic messages.)
- v. To send spam (i.e. unsolicited electronic messages) to a person or entity.
- v. To relentlessly attack an enemy with (a spell or ability).
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).(American Heritage® Dictionary of the English Language, Fourth Edition)
The original sense (canned ham) is a proprietary name registered by Geo. A. Hormel & Co. in U.S., 1937. It is presumed to be a conflation of spiced ham but was soon extended to other kinds of canned meat. (Wiktionary)