The Collaborative International Dictionary of English v.0.48:

Overwork \O`ver*work"\, v. t. [imp. & p. p. Overworkedor
   Overwrought; p. pr. & vb. n. Overworking.]
   1. To work beyond the strength; to cause to labor too much or
      too long; to tire excessively; as, to overwork a horse.
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   2. To fill too full of work; to crowd with labor.
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            My days with toil are overwrought.    --Longfellow.
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   3. To decorate all over.
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