Webster's English Dictionary

Enter the word to look up:

runoff

run.off \'r*n-.o.f\ n 1: the portion of the precipitation on the land that 
   ultimately reaches str eams; esp : the water from rain or melted snow that 
   flows over the surface 2: a final race, contest, or election to decide an 
   earlier one that has not  resulted in a decision in favor of any one 
   competitor