left field

WordReference Random House Unabridged Dictionary of American English © 2025

left′ field′, 

1. Sport [Baseball.]
   • the area of the outfield to the left of center field, as viewed from home plate.
   • the position of the player covering this area.
2. Slang Terms a position or circumstance that is remote from an ordinary or general trend.
3. Idioms out in left field, [Slang.] completely mistaken;
   wrong.
• 1855–60, American.