Became a Member can be described as two different crossword solutions: JOINED (6 letters) and Enteredthelists (15 letters). Joining is the process of becoming part of a group, organization, or team. It usually involves signing up or registering with the group and agreeing to abide by its rules and regulations. Enteredthelists is a phrase that implies being added to a list of members, such as a mailing list or a membership roster. Becoming a member of a group or organization often involves both joining and entering the lists.