An amount or quantity beyond what is needed, desired, or appropriate: fat, glut, overage, overflow, overmuch, overrun, overstock, oversupply, superfluity, surplus, surplusage.

An amount or quantity beyond what is normal or sufficient; a surplus: sold most of the stoves and put the excess in the warehouse. 3. The amount or degree by which one quantity exceeds another: Profit is the excess of sales over costs.