lock down
verb1
To secure (something).
- But even as the fireball races both skywards and downwards, the mortally-wounded Major Francis Harvey, Royal Marines, crawls over to a voicepipe despite the loss of both legs and orders the magazines locked down and flooded. It's his last act on this Earth; his body will be found later, next to the voicepipe.2020 July 15, Drachinifel, 46:43 from the start, in The Battle of Jutland - Clash of the Titans - Part 1 (Beatty vs Hipper), archived from the original on 03 Oct 2024:
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.
- 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.
4
To make (an arrangement) secure, definite, or permanent; to fix.
5
Slang To cause (another person) to enter into an exclusive romantic relationship.
- 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.