lock down

En français : confiner

1. To secure (something). (transitive)
2. To blockade and lock (e.g. a building or campus) so as to prevent ingress or egress; to make the occupants (of an area) stay locked indoors for their safety. (transitive) · Police have the area locked down until the situation is all-clear.
3. To limit the use of (a computer network) to only users with permission. (transitive)
4. To make (an arrangement) secure, definite, or permanent; to fix. (transitive)
5. To cause (another person) to enter into an exclusive romantic relationship. (slang, transitive) · It took me some time, but I finally locked her down.
6. To travel through a flight of locks on a waterway in a downhill direction. (intransitive)