1. To send unwanted and unsolicited junk e-mail; often as an advertisement, to many people: Anyone who spams people on the internet, usually tries to trick the recipients into providing private and personal information in order to steal money from them.
2. To post a message many times to a newsgroup, or an inappropriate message that is sent to multiple newsgroups and individuals on websites: Zelda didn't realize that an offer of sharing money from an unknown person, who was spamming her, was a trick to get her money.

Everyday there is someone who spams with e-mails over and over again and all of us should avoid opening such messages.