lock down

lock down (third-person singular simple present locks down, present participle locking down, simple past and past participle locked down)

1. (transitive) To secure (something); to blockade and lock (a building or campus) so as to prevent ingress or egress; to make (people) stay locked indoors for their safety.

   Coordinate terms: lock away, lock in, lock out, lock up

   Police have the area locked down until the situation is all-clear.

2. (transitive) To limit the use of (a computer network) to only users with permission.
3. (transitive) To make (an arrangement) secure, definite, or permanent; to fix.
4. (transitive, slang) To cause (another person) to enter into an exclusive romantic relationship.

   It took me some time, but I finally locked her down.

5. (intransitive, boating) To travel through a flight of locks on a waterway in a downhill direction.

   Antonym: lock up

   Hypernym: lock through

• belock