To cut off is to separate or disconnect something. Cut off the power, cut off by snow, cut off in mid-sentence.
It covers supply, communication and access alike, so a phone line, a village and a speaker can all be cut off. A person cut off by their family is disinherited or shunned, which is the coldest use.
1phrasecut offTo separate or disconnect — a phone line, power, or a village by snow.
“The storm will cut off the whole valley for a day or two.”
cut off is a phrase.
Practised in Phrasal Verbs