bat‧tle‧field /ˈbætlfiːld/ (also bat‧tle‧ground /bætlɡraʊnd/) noun [countable]

1. a place where a battle is being fought or has been fought

2. a subject that people disagree or argue a lot about:
Education has become a political battleground.

3. a place where an argument or disagreement happens, or where people are competing against each other:
a battleground state during the election

[TahlilGaran] Dictionary of Contemporary English ▲