sign off

Noun

(broadcasting) The closing of a radio or television station's studios and cessation of the broadcasting signal, usually overnight.

Japanese Meaning

ラジオやテレビ局が、スタジオを閉鎖し、放送を終了する行為、特に深夜帯における放送信号の停止を指す。 / 放送局の業務終了時に行われる、放送の一時停止や終業のプロセス。

At midnight the local station's sign off was accompanied by a short national anthem and a fading carrier tone.

真夜中、地元の放送局は短い国歌とフェードアウトする搬送波音とともに放送を終了した。

Sense（1）

(broadcasting) The closing of a radio or television station's studios and cessation of the broadcasting signal, usually overnight.

Sign off for the small-town radio station was at midnight.

sign offs

（ plural ）