1. to cause to work too hard, too much, or too long; weary or exhaust with work (often used reflexively): Don't overwork yourself on that new job.
2. to work up, stir up, or excite excessively: to overwork a mob to the verge of frenzy.
3. to employ or elaborate to excess: an appeal for sympathy that has been overworked by many speakers.
4. to work or decorate all over; decorate the surface of: white limestone overworked with inscriptions.
to work too hard, too much, or too long; work to excess: You look as though you've been overworking.
1. work beyond one's strength or capacity.
2. extra or excessive work.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.