To refrain from, to abstain from, to pass up, to withgo.
To let pass, to leave alone, to let go.
To do without, to abandon, to renounce.
To log off; to stop using a computer, radio, etc., especially to stop talking.
to give one's official approval to something for which it is needed
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.