noun
refraining from going outside; staying indoors
Often used in the context of public health advisories, natural disasters, or voluntary self-restraint. Implies a conscious decision to avoid going out, not just being at home.
感染拡大を防ぐため、政府は外出自粛を呼びかけている。
To prevent the spread of infection, the government is urging people to refrain from going outside.
台風が接近しているので、今日は外出自粛にします。
Since a typhoon is approaching, I'll stay indoors today.