Sleep

Sleep is a command which delays the execution of a program or causes a command to be executed in the background after a delay. The command "sleeps" for an interval and then returns; the application does not respond to events while the command is sleeping.

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The Jargon File 3.0

Sleep is one of the more pedestrian terms to be found in The Jargon File; colorful language abounds, don't resist the urge to look up "scratch monkey" or "asbestos cork award", or you will be missing some great definitions.