Sign off and Walking out

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

Walking out and sign off are semantically related In some cases you can replace term "Walking out" with "Sign off", this phrasal verbs are similar.

Walking out noun - The act of leaving a place.

Sign off and walking out are semantically related in resign topic. Sometimes you can use "Sign off" instead a verb "Walking out", if it concerns topics such as give up responsibility.