1. Of, relating to, or showing a difference. 2. Constituting or making a difference; distinctive. 3. Dependent on or making use of a specific difference or distinction. 4. Of or relating to differentiation. 5. Involving differences in speed or direction of motion. 6. An infinitesimal increment in a variable. 7. The product of the derivative of a function containing one variable multiplied by the increment of the independent variable. 8. Differential gear. 9. A difference in wage rate or in price.