/bawl"pahrk'/ , n.
1. a tract of land where ball games, esp. baseball, are played.
2. a baseball stadium.
3. in the ballpark , Informal. within reasonable, acceptable, or expected limits: The price may go up another $10, but that's still in the ballpark.
adj.
4. Informal. being an approximation, based on an educated guess: Give me a ballpark figure on our total expenses for next year.
Also, ball park .
[ 1895-1900, Amer.; BALL 1 + PARK ]