to give one's official approval to something for which it is needed
To log off; to stop using a computer, radio, etc., especially to stop talking.
To cease broadcasting a radio or television signal, usually at the end of a broadcasting day.
The closing of a radio or television station's studios and cessation of the broadcasting signal, usually overnight.
The time of day when a radio or television station begins broadcasting, usually after being off the air for several hours.
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.
To commit oneself, as to a project, a goal, an organization, a cause.
To join something, after signing.
To apply to receive unemployment benefits.
To log on; to start using a computer, radio, etc., or to start talking.