What is an armada?

an army led by priests

a large fleet of warships

soldiers armed with bows and arrows

any invading military force

Armada is a large fleet of warships

Explanation:

Armada is a big formation of warships, the biggest fleet in any navy. This fleet is controlled by one leader. If you have to compare the navy, the best way would be to say that armada is army on the water and it's the equivalent to an army on land. It is a group of ships that are under command of one ownership.