noun (n)

• a facility in which ball games are played (especially baseball games)(noun.artifact)

  Example:
  Take me out to the ballpark.
  

  Synonym:
  park
  

  source: wordnet30
• near to the scope or range of something(noun.attribute)

  Example:
  His answer wasn't even in the right ballpark.
  

  Synonym:
  approximate range
  

  source: wordnet30