fourscore(n = noun.quantity) 80, eighty, lxxx - the cardinal number that is the product of ten and eight;
is a kind of large integer

   fourscore(s = adj.all) 80, eighty, lxxx - being ten more than seventy;

   Four times twenty; eighty. [1913 Webster]

   The product of four times twenty; eighty units or objects. [1913 Webster]

fourscore, n. archaic eighty.