Descriptive of anything that a recipient did not actively choose to receive, but particularly:
1. Email or IM messages. See spam.
2. Browser or Windows Messenger windows. See pop-up.
3. Malware downloads and network transfers. See adware, spyware, scumware, virus, trojan, and worm.
1. I was gone for four days and had 600 unsolicited email messages when I returned.
2. I used to get a lot more unsolicited browser pop-ups in older browser versions.
3. Some browser pop-ups would try to download unsolicited software.