sign on

Từ điển Oxford Advanced Learner 8th

▪ I. ˌsign ˈon derived
(BrE, informal)to sign a form stating that you are an unemployed person so that you can receive payment from the government
Main entry: ↑sign_derived
 
▪ II. 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