English Dictionary

sign off

verb

(idiomatic) To log off; to stop using a computer, radio, etc., especially to stop talking. / (broadcasting) To cease broadcasting a radio or television signal, usually at the end of a broadcasting day.

I always sign off from my computer before leaving the office.

意味（1）

(idiomatic) To log off; to stop using a computer, radio, etc., especially to stop talking.

He finished the conversation and signed off.

意味（2）

(broadcasting) To cease broadcasting a radio or television signal, usually at the end of a broadcasting day.

Before he signed off the radio station for the night, the disc jockey played the National Anthem.

意味（3）

(followed by “on”) to give one's official approval to something for which it is needed

Once the vice-president signs off on the project, we can start construction.