lockˈdown noun

1. An act of confining prisoners to their cells, esp as a means of restoring order
2. Any general cessation of activity, esp in response to a crisis

locked in adjective

1. Securely fixed, not subject to change (informal)
2. Concentrating and performing at one's best (slang)

locked-in syndrome noun (medicine)

A neurological condition, resulting from brainstem damage, in which the subject is conscious and aware but unable to move or communicate, other than sometimes through blinking

lock gate noun

A gate for opening or closing a lock in a canal, river, or dock-entrance

lockˈ-hosˈpital noun (archaic)

A hospital for venereal diseases (from one in Southwark, orig a lazar-house, probably since specially isolated)

lockˈhouse noun

A lock-keeper's house

lockˈ-in noun (informal)

A period of drinking in a pub after it has officially closed for the night

lockˈjaw noun

1. Tetanus
2. Loosely, trismus

lockˈ-keeper noun

The attendant at a lock

lockˈman noun

1. A lock-keeper
2. A hangman (Scot; obsolete)
3. An undersheriff, or a coroner's summoner (Isle of Man)

lockˈnut or lockˈing-nut noun

1. A nut screwed on top of another one to prevent it loosening
2. A nut designed to lock itself when screwed tight

lockˈout noun

The act of locking out, esp used of the locking out of employees by the employer during an industrial dispute

lockˈpick noun

A picklock

locksˈman noun

1. A turnkey
2. A lock-keeper

lockˈsmith noun

A person who makes and mends locks

lockˈstep noun

A method of marching in tight formation, with minimum space between one marcher and the one behind (in lockstep operating in close conformity)

lockˈstitch noun

A sewing-machine stitch formed by the locking of two threads together

lockˈ-up noun

1. A cell for locking up prisoners
2. A lockable shelter for a motor vehicle
3. A small shop
4. A locking up
5. A long-term investment (finance)

adjective

Capable of being locked up

lock away

To hide, usu by locking up out of sight

lock horns

To engage in combat, physical or otherwise

lock in

To confine by locking doors

lock on (to)

Of a radar beam, to track (an object) automatically

lock out

1. To keep out by locking doors
2. To exclude employees from a factory, etc
3. To prevent other users from accessing (a file) while one user is reading or updating it (computing)

lock, stock and barrel

1. The whole
2. Altogether, entirely

lock up

1. To confine
2. To lock securely
3. To lock whatever is to be locked
4. To make inaccessible or unavailable (figurative)
5. To invest (capital) so that it cannot be readily realized

under lock and key

1. Locked up
2. Imprisoned