Original: A combat sport (also known as a combative sport) is a competitive contact sport where two combatants fight against each other using certain rules of engagement, typically with the aim of simulating parts of real hand to hand combat.
Simplified: A combat sport (also known as a combative sport) is a competitive contact sport where two combatants fight against each other using certain rules of contact, with the aim of simulating parts of real hand to hand combat.