ballpark

Etymology

ball +‎ park

Noun

ballpark (plural ballparks)

1. (US) A field, stadium or park where ball, especially baseball, is played.
2. (US, figuratively) The general vicinity; somewhere close; a broad approximation.

   Let’s get in the ballpark, then worry about the fine details.

   • 1990, Paul Simon, “The Obvious Child”, The Rhythm of the Saints, Warner Bros.,

     Some people say a lie is just a lie / But I say the cross is in the ballpark / Why deny the obvious, child?

Adjective

ballpark (not comparable)

1. Approximate; close; on the right order of magnitude.
   • 1986, Darrell J. Steffensmeier, The Fence: In the Shadow of Two Worlds‎, →ISBN, page 104:

     These are ballpark prices: you could give or take a little either way.

Verb

ballpark (third-person singular simple present ballparks, present participle ballparking, simple past and past participle ballparked)

1. To make a rough estimate of.

   If you don’t have the exact expense total, just ballpark it.