Spam meaning : (rarely countable) Unsolicited bulk electronic messages. Any undesired electronic content automatically generated for commercial purposes. A type of tinned meat made mainly from ham. To send spam (i.e. unsolicited electronic messages.) To send spam (i.e. unsolicited electronic messages) to a person or entity. (by extension) To use (a spell or ability) rapidly and repeatedly. To post the same text repeatedly with disruptive effect; to flood.