Definition of blinker :
1. 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.
2. A kind of goggles, used to protect the eyes form glare, etc.
3. One who, or that which, blinks.
- Our fourth, a blinker, blundered to victory; our fifth hung himself twice to the canvas and finally to the heels of a bewildered spangle; our sixth, a stag, and a wheeling lunatic at that, gave to the Fifty- fourth a bad quarter of an hour, and then, when at the last moment our victory seemed certain, was sent flying to eternity in one last feathered whirlwind, leaving us four to split and four to go, with hopeless odds against us, and Sir Peter calmly booking side- bets on anything that anybody offered. - "The Reckoning", Robert W. Chambers.