ball park at English => English (Longman) Of Explained:
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1 [C] AmE a field for playing baseball with seats for watching the game:
2 in the (right) ball park: informal close to the amount, price etc that you want or are thinking about// --Their estimate is in the right ball park.//
3 a ball-park figure/estimate/amount: a number or amount that is almost but not exactly correct// --He said $25,000 but it's just a ball-park figure.//