a. the area of the outfield to the left of center field, as viewed from home plate.
b. the position of the player covering this area.
2. Slang.a position or circumstance that is remote from an ordinary or general trend.
3. out in left field, Slang.completely mistaken; wrong.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.