Meaning

• A contest, a struggle.

  "the battle of life"

• A general action, fight, or encounter, in which all the divisions of an army are or may be engaged; a combat, an engagement.

• A division of an army; a battalion.

• The main body of an army, as distinct from the vanguard and rear; the battalia.

Meaning

• To join in battle; to contend in fight

  "Scientists always battle over theories."

• To fight or struggle; to enter into a battle with.

  "She has been battling cancer for years."