D defs.my
Entry 3 senses Webster, 1913

Blinker

· Blink·er · IPA /ˈblɪŋkəɹ/
01 n. One who, or that which, blinks.
  1. 1.
    One who, or that which, blinks.
  2. 2.
    A blinder for horses; a flap of leather on a horse's bridle to prevent him from seeing objects as his side hence, whatever obstructs sight or discernment.
    “Nor bigots who but one way see, through blinkers of authority.” — M. Green.
  3. 3.
    A kind of goggles, used to protect the eyes form glare, etc.