Noun left field has 2 senses
  1. left field, left - the piece of ground in the outfield on the catcher's left
    --1 is a kind of tract, piece of land, piece of ground, parcel of land, parcel
    --1 is a part of outfield
  2. left field - the fielding position of the player on a baseball team who is expected to field balls in the left third of the outfield (looking from home plate)
    --2 is a kind of
    --2 is a member of baseball team