1
general::
Phrase(s): sign up (for something)
to record one’s agreement to participate in something. • I want to sign up for guitar lessons. • We will sign up as soon as possible., Phrase(s): sign someone up (with someone or something)
to record the agreement of someone to join someone, a group of people, or an organization. • I want to sign George up with our softball team. • Tom signed up his friends with the agency., Phrase(s): sign someone up (for something)
to record the agreement of someone, including oneself, to participate in something. • Has anyone signed you up for the office picnic? • Can you sign up Liz for the party?
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Enlist in an organization; also, register or subscribe to something. For example, He signed up for four years in the navy, or Are you planning to sign up for that pottery class? [Early 1900s]
American Heritage Idioms