lockdown
/ˈlɒkˌdaʊn/
noun
Meaning
The confinement of people in their own rooms (e.g. in a school) or cells (in a prison), or to their own homes or areas (e.g. in the case of a city- or nation-wide issue) as a security measure after or amid a disturbance or pandemic, etc.
A contrivance to fasten logs together in rafting.