Definitions from Wiktionary (lock out)

▸ verb:  (transitive) To inadvertently prevent (a person, particularly oneself) from entering a place, by leaving it locked.
▸ verb:  (computing) To prevent from accessing a data structure.
▸ verb:  (transitive) (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)
▸ noun:  Misspelling of lockout. [(labour) The opposite of a strike; a labor disruption where management refuses to allow workers into a plant to work even if they are willing.]
▸ Also see lock_out

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