·add. ·- Any profit above the normal rate of interest and wages accruing to a producer on account of some monopoly (temporary or permanent) of the means or materials of production;
— called also Producer's rent.
·noun That which remains when use or need is satisfied, or when a limit is reached; excess; overplus...
Webster's Dictionary of the English Language
·add. ·- Goods that satisfy wants only indirectly as factors in the production of other goods, such ...
·add. ·- The excess that a purchaser would be willing to pay for a commodity over that he does pay, ...