blinker

Any flashing light can be called a blinker, but it usually refers to the turn signal on a car. Before you suddenly turn left, be sure to put your blinker on.

A light that blinks on and off is a blinker, and it may be used to signal your plans to change direction in a car, or to send some kind of signal. Another meaning of the word is "blinder," a kind of eye patch that's used in horse racing to block the horse's peripheral vision so it won't get distracted. To blinker a horse is to attach blinkers to its harness.

Definitions of blinker
  1. noun
    a light that flashes on and off; used as a signal or to send messages
    synonyms: flasher
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    type of:
    light, light source
    any device serving as a source of illumination
  2. noun
    a blinking light on a motor vehicle that indicates the direction in which the vehicle is about to turn
    synonyms: trafficator, turn indicator, turn signal
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    type of:
    visual signal
    a signal that involves visual communication
  3. noun
    blind consisting of a leather eyepatch sewn to the side of the halter that prevents a horse from seeing something on either side
    synonyms: blinder, winker
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    type of:
    blind, screen
    a protective covering that keeps things out or hinders sight
  4. verb
    put blinders on (a horse)
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    type of:
    cover
    provide with a covering or cause to be covered
  5. verb
    cause to have a limited or narrow view of a situation
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    type of:
    cover, cover up
    hide from view or knowledge
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