Sleep-mode meaning

An energy-saving mode of operation in certain computers, in which the screen display and some programs are rendered temporarily inactive after a period of disuse.
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A low power mode in a computer. Also called "standby mode," the screen and hard disks are turned off, but the memory (RAM) chips are continually refreshed in order to retain their contents. In addition, the CPU is throttled down to its lowest power state. The computer is immediately restored for use when the user touches a key or moves the mouse. For alternate power-down and hybrid sleep modes, see hibernate.
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(computing) The state of a computer system (especially a laptop), in which the screen and hard drive are switched off, and the only task running monitors external activity (such as a key press) which restores the system to its active state.
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