Combat means fighting between opposing forces, especially during war. When armies engage in combat, soldiers face each other on the battlefield with weapons. Combat can happen on land, at sea, or in the air: fighter pilots engage in aerial combat, while naval vessels might clash at sea.

The word describes both the general idea of fighting and specific encounters. Historians might study the combat tactics used in famous battles, while a veteran might recall moments of intense combat during their service. Combat often requires physical strength, courage, quick thinking, and teamwork.

Beyond military contexts, combat can describe any serious struggle or fight. Doctors work to combat disease. Communities combat poverty. When you combat your fear of public speaking by practicing your presentation over and over, you're fighting against something that challenges you.

As an adjective, combat describes things related to fighting: combat boots are sturdy footwear designed for soldiers, combat training prepares military personnel for battle, and a combat zone is an area where fighting is happening. The word carries weight and seriousness, quite different from casual words like “fight” or “scuffle.” Combat involves real danger and high stakes.