Meaning of “lock someone out” in the English Dictionary

american-english dictionary

"lock someone out" in American English

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lock someone out

phrasal verb with lock us /lɑk/ verb [ I/T ]

to prevent someone from getting into a building, room, or vehicle:

I forgot that my dad didn't have keys, and I locked him out of the house.
The door slammed and our keys were inside – so we were locked out (= unable to get in).

(Definition of “lock someone out” from the Cambridge Academic Content Dictionary © Cambridge University Press)