(broadcasting) The time of day when a radio or television station begins broadcasting, usually after being off the air for several hours.
Sign on for the radio station is at 5 a.m.
To join something, after signing.
To commit oneself, as to a project, a goal, on organization, a cause.
I never signed on for this.
(broadcasting) 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.
Years ago, the TV station would sign on at 5 a.m., but now it broadcasts 24 hours a day.
(UK, intransitive) To receive unemployment benefits.
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