The term 'JOINED (UP)' can be described by four different crossword solutions: TEAMED (6 letters), ENLISTED (8 letters), MET (3 letters), and SIGNEDON (8 letters). TEAMED implies that two or more people have come together to form a group, while ENLISTED suggests that someone has formally enlisted in an organization or army. MET implies that two or more people have come into contact with each other, and SIGNEDON implies that someone has agreed to become part of a team or organization. All of these solutions indicate that someone has become part of a group or organization in some way.