What is sing. or pl. The whole money or other things staked at a horse race, a given sum being put up for each horse, all of which goes to the winner, or is divided among several, as may be previously agreed called?

sweepstakes — sing. or pl. The whole money or other things staked at a horse race, a given sum being put up for each horse, all of which goes to the winner, or is divided among several, as may be previously agreed. (Webster's 1913.)