ballpark Syllabification: (ball·park)Pronunciation: /ˈbôlˌpärk/Translate ballpark | into German | into Italian | into Spanish Definition of ballpark noun North American a baseball stadium or field. informal a particular area or range:we can make a pretty good guess that this figure’s in the ballpark adjective [attributive] informal (of prices or costs) approximate; rough:the ballpark figure is $400–500ballpark in other Oxford dictionaries Definition of ballpark in the British & World English dictionary