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lock out

B1 neutral separable transitive
In simple words

To stop someone from getting inside somewhere by locking the entrance.

Literal meaning: To lock a door so that someone on the outside cannot get in — 'out' indicates exclusion.

Meanings

1 B1 neutral

To accidentally or deliberately prevent someone from entering a building by locking the door.

"I locked myself out of the flat and had to call a locksmith."

Grammar: separable
2 B2 neutral

(Labour relations) For an employer to prevent workers from entering their workplace during a dispute.

"Management locked out the workers after contract negotiations broke down."

Grammar: separable
3 B2 neutral

(Computing) To deny access to an account or system, typically after too many failed login attempts.

"The system locked her out after three incorrect password entries."

Grammar: separable
4 B2 idiomatic neutral

To deliberately exclude a person or group from a process, opportunity, or benefit.

"Rising house prices have locked many young people out of the property market."

Grammar: separable
Usage notes

Has an important specific meaning in labour relations: an employer 'lockout' means refusing employees access during a dispute. In everyday use, very common for accidentally locking yourself out of your house. Also used in computing for account lockouts after failed login attempts.

Commonly used with

house car account workers employees system

Forms

Base
lock out
I/you/we/they
3rd person
locks out
he/she/it
Past simple
locked out
yesterday
Past participle
locked out
have + pp
-ing form
locking out
continuous

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Synonyms

exclude bar shut out block access deny entry

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