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To sleep for a very long time.

In particular, longer than you would for a normal sleep and shorter than bedrest
Man, I wish I had just slept instead of slumbered.
by Jason101 December 25, 2005
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1) Having a deep sleep.
2) To have consensual sexual intercourse/relations with someone, while they are staying at your place for the night.
1) "Last night, I went into an evil slumber."
2) "You and Amal like to slumber don't you?" Asked Ryan's jealous friend.
by Frejayork May 17, 2015
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