Slumber is sleep. He had fallen into exhausted slumber He roused Charles from his slumbers. Slumber is also a verb. The older three girls are still slumbering peacefully. to sleep (sloom (13-19 centuries), from sluma ). slumbers sleep
a natural and periodic state of rest during which consciousness of the world is suspended; "he didn't get enough sleep last night"; "calm as a child in dreamless slumber"
[ 'sl&m-b&r ] (intransitive verb.) 13th century. Middle English, frequentative of slumen to doze, probably from slume slumber, from Old English sluma; akin to Middle High German slumen to slumber.