(idiomatic) To come into conflict.

The technique of twisting the ankle of someone already down, in order to keep them down, under the painful threat of an injury to their ankle that will mar them for life.

A lock, typically on a door in a bank vault, that cannot be unlocked before a specified time.

plural of lock in

(astronomy) Subject to tidal locking.

(astronomy) The locking of the rotation of a satellite (moon or planet) to its orbit, such that one side always faces the body around which it is orbiting.

A lock situated between an enclosed basin or a canal and the tide water of a harbor or river, when they are on different levels, so that craft can pass either way at all times of the tide

Preventing something from becoming stuck or jammed. Especially applies to anti-lock brakes, which are designed to continue rotating for better steering control while slowing the vehicle, rather than "locking" and causing the car to skid.

(US, slang) A command to prepare a weapon for battle. / (US, slang) Prepare for an imminent event.

(US, slang) To prepare one's weapon. / (US, slang) To prepare for an imminent event.