sign on
verb
High School
1
To join something, after signing.
2
To commit oneself, as to a project, a goal, an organization, a cause.
3
To begin broadcasting a radio or television signal, usually at the beginning of a broadcasting day and after being off the air for several hours.
4
To log on; to start using a computer, radio, or other multicast device; to start talking.
5
To apply to receive unemployment benefits.