the rule that any 1 entity is considered as one person or objective, mainly in contests to kill large numbers.
no matter the size, strenght or condition, it still "counts as one."
the battle for minas tirith:
*legolas just took down a huge Eliphaunt with 3 arrows straight to the head*
gimly: That still counts as one!
this is known as the Gimlican Rule of Kill Measurement.