n.
 an amount left over when requirements have been met. 
▸an excess of income or assets over expenditure or liabilities in a given period.
 ▸the excess value of a company's assets over the face value of its stock.
adj.
 excess; extra.
Etymology
  ME: from OFr. sourplus, from med. L. superplus, from super- ‘in addition’ + plus ‘more’.