1. [noun] a light that flashes on and off; used as a signal or to send messages
    Synonyms: flasher

  2. [noun] a blinking light on a motor vehicle that indicates the direction in which the vehicle is about to turn
    Synonyms: turn signal, turn indicator, trafficator

  3. [noun] blind consisting of a leather eye-patch sewn to the side of the halter that prevents a horse from seeing something on either side
    Synonyms: winker, blinder

  4. [verb] put blinders on (a horse)