lock

lock horns

if two people lock horns, they argue about something. The mayor and her deputy locked horns over the plans for the new road. (often + over)

See also: horn

lock, stock, and barrel

including all or every part of something. He's been pressing for the organization to move, lock, stock, and barrel, from Paris to Brussels.

See also: barrel

under lock and key

1. kept safely in a room or container that is locked. I tend to keep medicines under lock and key because of the kids.

2. in prison. I think the feeling from the general public is that people like that should be kept under lock and key for the rest of their lives.

See also: key

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lock horns (with someone)

to argue with someone in a very determined way. In her new movie she plays a middle-aged college student who locks horns with her professor.

Etymology: based on the literal meaning of two fighting animals such as deer whose horns lock together

See also: horn

lock in something

to be unable to change a condition. A large percentage of these groups remain locked in poverty. The two countries are locked in a dispute over the islands off the northern coast.

lock, stock, and barrel

taking or including everything. The soldiers received orders that they were to move, lock, stock and barrel, some 600 miles west.

See also: barrel

under lock and key

in a safe, protected place. The old man keeps such documents under lock and key.

See also: key