1) Color excessively 2) To dye over another color 3) To dye too long or too much 
• (v. t.) To dye with excess of color; to put one color over (another).
O`ver·dye' transitive verb To dye with excess of color; to put one color over (another). Shak. 
to dye too long or too much. · to dye over another color.