lock out
verb
High School
1
To inadvertently prevent (a person, particularly oneself) from entering a place, by leaving it locked.
2
To prevent from accessing a data structure.
3
(industrial) To prevent (a person, including oneself) from powering up or turning on a machine when doing so would be dangerous (accomplished with objects such as padlocks or zip ties placed through the switch handle, for example)
4
(colloquial, sometimes humorous) To be unable to concentrate.
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