Marketing Mondays: "Unsolicited" Submissions

There's no mystery to this message..Kim from Minneapolis writes: "Lately on gallery websites I've been seeing the specific phrase: 'We are currently not accepting unsolicited submissions.' Why the change from 'We are currently not accepting submissions?' What does unsolicited mean in this context? Are they trying to say, 'We're not taking on any new artists but we might be willing to look at your