/ ˈbɔːlpɑːk; NAmE -pɑːrk/ noun
1.
[ C ] ( especially NAmE ) a place where baseball is played
2.
[ sing. ] an area or a range within which an amount is likely to be correct or within which sth 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) .