Left field

noun 1. the position of the player defending left field 2. the part of the baseball outfield to the left looking out from the plate 3. a. a state or position far from the mainstream (as of prevailing opinion) Example: they were really out in left field with that idea b. a source of the unexpected or illogical Example: that question came out of left fieldleft fielder noun

Merriam-Webster's Collegiate Dictionary