- the middle area of the outfield- the defensive position of the outfielder (center fielder) who plays therecenter fieldcenter field- The middle third of the outfield, behind second base. - The position played by the center fielder.- (baseball) The part of a baseball field which is beyond the infield and straight ahead left if you stand on home plate and face the pitcher. - (baseball) The defensive position in the outfield in the middle, typically played by a player that can run fast.- (idiomatic) A central role in some activity that requires speed. - I'd be happy to play center field on this proposal. I can cover a lot of ground.