Wiktionary:Word of the day/2023/October 12

1. A person or an animal that winks (“blinks with one eye; blinks with one eye as a message, signal, or suggestion, usually with an implication of conspiracy”).
   1. A person who connives with another; a conniver.
2. A thing which is used to wink with, or which winks.
   1. (automotive, informal) Synonym of turn signal (“each of the flashing lights on each side of a vehicle which is used to indicate that the vehicle is moving left or right”); a blinker, an indicator.
   2. (equestrianism, also attributive and figurative) Chiefly in the plural: synonym of blinker (“a shield attached to the bridle of a horse or other domesticated animal to prevent it from seeing things behind it and to its side”)
   3. (music) A small bellows in an organ, regulated by a spring, which controls variations of wind pressure.
   4. (ornithology) The nictitating membrane (“transparent protective fold of skin acting as an inner eyelid”) of a birds's eye.
   5. (British, dialectal or slang) An eye.
   6. (British, US, dialectal or slang) An eyelash.

Today, the second Thursday of October in 2023, is World Sight Day, which is coordinated by the International Agency for the Prevention of Blindness and the World Health Organization to draw attention to blindness and vision impairment, and to emphasize the importance of eye care.