Buttoned-up and Sign off

Buttoned-up adjective - Having or showing a lack of friendliness or interest in others.

Sign off and buttoned-up are semantically related. In some cases you can use "Sign off" instead a verb phrase "Buttoned-up".

Sign off verb - Cease broadcasting; get off the air; as of radio stations.

Buttoned-up and sign off are semantically related. Sometimes you can replace phrase "Buttoned-up" with "Sign off", this terms are similar.