ballpark noun definition in Baseball topic from the Oxford Advanced Learner's Dictionary

ballpark

 noun: Baseball topic
1 [countable] (especially North American English) a place where baseball is played2 [singular] an area or a range within which an amount is likely to be correct or within which something can be measured The offers for the contract were all in the same ballpark. If you said five million you'd be in the ballpark. Give me a ballpark figure (= a number that is approximately right).