What is the meaning of blink?

noun

• A reflex that closes and opens the eyes rapidly.
  • synonyms: eye blink, blinking, wink, winking, nictitation, nictation

verb

• Briefly shut the eyes.
  • usage: "The TV announcer never seems to blink"
  • synonyms: wink, nictitate, nictate
• Force to go away by blinking.
  • usage: "blink away tears"
  • synonyms: wink, blink away
• Gleam or glow intermittently.
  • usage: "The lights were flashing"
  • synonyms: flash, wink, twinkle, winkle