1. (n.) A spam message is an unsolicited, usually commercial e-mail message. It is also referred to as UCE, or unsolicited commercial e-mail. From the sender's point-of-view, it's a form of bulk mail, often to a list culled from subscribers to a Usenet discussion group or obtained by companies that specialize in creating e-mail distribution lists. To the receiver, it usually seems like junk e-mail.

2. (v.) The practice of sending massive amounts of e-mail promotions or advertisements (and scams) to people that have not asked for it. Spam mail is controversial and there are many levels of definitions for it.