What is the meaning of Lock_down?
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.
To limit the use of (a computer network) to only users with permission.
To make (an arrangement) secure, definite, or permanent; to fix.
To cause (another person) to enter into an exclusive romantic relationship.
To travel through a flight of locks on a waterway in a downhill direction.
Source: wiktionary.orgSearch words containing