left field • n. Baseball the part of the outfield to the left of center field from the perspective of home plate: a high fly to left field. ∎ the position of the defensive player stationed in left field: I played left field a lot against him. ∎ fig. a position or direction that is surprising or unconventional: seldom do so many witty touches come out of left field. ∎ fig. a position of ignorance, error, or confusion: he's so far out in left field that even his followers are embarrassed.DERIVATIVES: left field·er n.