Overlabor \O`ver*la"bor\, v. t. [imp. & p. p. {Overlabored}; p. pr. & vb. n. {Overlaboring}.] [1913 Webster] 1. To cause to labor excessively; to overwork. --Dryden. [1913 Webster] 2. To labor upon excessively; to refine unduly. [1913 Webster]