Pronunciation: (ō"vur-slēp'), [key]
—v., -slept, -sleep•ing.
to sleep beyond the proper or intended time of waking: He overslept and missed his train.
1. to sleep beyond (a certain hour): She had overslept her usual time of arising.
2. to let (oneself) sleep past the hour of arising: Of all mornings to oversleep myself!
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.