The term 'SIGNS UP' can be interpreted in a variety of ways. The crossword solutions for this term include 'ENROLS' (6 letters), 'ZODIAC' (6 letters), 'ENROLLS' (7 letters), 'ENLISTS' (7 letters), 'JOINS' (5 letters), and 'HIRES' (5 letters), as well as 'INKS' (4 letters). Enrolling, enlisting, joining, and hiring all involve signing up for something, whether it be a school, a military service, a club, or a job. ZODIAC signs are also associated with signing up, as they are used to determine one's astrological sign. Lastly, inking is another way of signing up, as it involves signing a document with a pen.