What is Wink?

Wink is (verb) 1. to shut and open one eye quickly, as a signal She winked at him to try to tell him that everything was going well. 2. (of lights, stars) to flash on and off The lights of the harbour were winking in the distance. (noun) 1. the act of opening and shutting one eye quickly She gave him a wink to show that she had seen him take the piece of cake. 2. hardly sleep a wink almost not to sleep at all We hardly slept a wink last night because the children kept waking us up. ?


source: Easier English, Student Dictionary Upper Intermediate Level