battle:1.A hostile engagement or encounter between opposing forces on land or sea; a combat, a fight.2.A fight between two persons, a single combat, a duel. ——Oxford English Dictionary

battle:1.a fight between opposing armies, groups of ships, groups of people etc, especially one that is part of a larger war.2.a situation in which opposing groups or people compete or argue with each other when trying to achieve success or control.3.an attempt to solve a difficult problem or change an unpleasant situation.——Longman Dictionary of Contemporary English  @en