To bar (someone or something) from entering; to keep out.
To expel; to put out.
To omit from consideration.
To refuse to accept (evidence) as valid.
To eliminate from diagnostic consideration.
To inadvertently prevent (a person, particularly oneself) from entering a place, by leaving it locked.
To prevent from accessing a data structure.
An event in which an employer bars employees from working as a tactic in negotiating terms of employment, particularly in response to a strike or threat to strike.