1blink 
/ˈblɪŋk/ verb
blinks; blinked; blink·ing /ˈblɪŋk/ verb 1 : to close and then open your eyes very quickly [no obj] ▪ She blinked when the light flashed. ▪ Her eyes blinked when the light flashed. [+ obj] ▪ She blinked her eyes when the light flashed. — compare wink 2 [no obj] : to shine with a light that goes on and off
▪ The red light was blinking. [=flashing] 3 [no obj] : to show that you are surprised or upset
▪ Laura didn't (even) blink [=did not seem surprised or upset at all] when I told her that the car was gone. ▪ She didn't (even) blink at the news. 4 [no obj] : to show weakness in an argument or disagreement : to show that you are willing to agree to or accept what someone else wants or says
▪ When threatened, the government blinked [=gave in] and agreed to move the missiles. ▪ Both sides in the dispute are determined not to blink first.
▪ The red light was blinking. [=flashing]
▪ Laura didn't (even) blink [=did not seem surprised or upset at all] when I told her that the car was gone. ▪ She didn't (even) blink at the news.
▪ When threatened, the government blinked [=gave in] and agreed to move the missiles. ▪ Both sides in the dispute are determined not to blink first.
before you can blink
informal : very quickly
▪ This may hurt a little, but it'll be over before you can blink.
▪ This may hurt a little, but it'll be over before you can blink.
blink back tears or blink away tears
: to prevent yourself from crying or to make your tears go away by blinking
▪ He blinked back (his) tears as he told us the bad news.
▪ He blinked back (his) tears as he told us the bad news.
