sign up

Từ điển Oxford Advanced Learner 8th

▪ I. ˌsign ˈon/ˈup | ˌsign sbˈon/ˈup derived
to sign a form or contract which says that you agree to do a job or become a soldier; to persuade sb to sign a form or contract like this
Syn: ↑enlist
•He signed on for five years in the army.
•The company has signed up three top models for the fashion show.
Main entry: ↑sign_derived
 
▪ II. ˌsign ˈup (for sth) derived
to arrange to do a course of study by adding your name to the list of people doing it
Main entry: ↑sign_derived