When two people who are in a relationship decide they need space from each other. They are not broken up, but they're not necessarily together still. Usually one person will expect the other to not flirt or do anything with other people while on the break. They also have intensions of staying together. Also known as being in a relationship, but it being complicated.
Girl 1:"Yeah, we're on a break."
Girl 2:"Oh are you two gonna get back together?"
Girl 1:"We're still in the relationship, it's just complicated.."