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.
To obstruct, cover, or otherwise block (an opening, a portion of an image, etc.).
To absorb, as a gas by a metal.