lockdown

noun lockdowns · lock-down

1. countable, uncountable 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 as a non-pharmaceutical intervention in a pandemic. At the time of writing, no decisions had been made by the Government as to when or how lockdown restrictions might begin to be lifted. However, discussions were taking place in the industry about how social distancing could be maintained on the railway if some patronage were to return soon.
2. US, countable, uncountable A contrivance to fasten logs together in rafting. The rafts were made up of strings of logs about seventeen feet wide, held together by poles across them. Each log was pinned to the poles by wooden pegs and lockdowns.