Original: In professional wrestling, a battle royal (sometimes battle royale; plural battles royal or battle royals) is a multi-competitor match type in which wrestlers are eliminated until one is left and declared winner.
Simplified: In professional wrestling, a battle royal (sometimes spelled battle royale; plural battles royal or battle royals) is a match type in which many wrestlers fight against each other at the same time and wrestlers are eliminated until only one is left. That person is then the winner.