ballpark (
http://definr.com/ballpark)
adj : not quite exact or correct; "the approximate time was 10
o'clock"; "a rough guess"; "a ballpark estimate" [syn:
approximate,
approximative,
rough]
n 1: a facility in which ball games are played (especially
baseball games); "take me out to the ballpark" [syn:
park]
2: near to the scope or range of something; "his answer wasn't
even in the right ballpark" [syn:
approximate range]