19. bat an instance at bat officially charged to a batter.
20. (n.)bat any of numerous flying mammals of the order Chiroptera, having largewings made of membranes extending from the forelimbs to the hind limbs and navigating, usu. at night, by echolocation.
1. (noun)bat, chiropteran nocturnal mouselike mammal with forelimbs modified to form membranous wings and anatomical adaptations for echolocation by which they navigate
2. (noun)bat, at-bat (baseball) a turn trying to get a hit "he was at bat when it happened"; "he got four hits in four at-bats"
4. bat not bat an eye/eyelash to not show any negativereaction "Of course I'll do it," she said without batting an eye.
5. bat go to bat for sb to do sth to help or showsupport He went to bat for me when nobody else believed me.
Definition of 'bat'
Webster Dictionary
1. (noun)bat a large stick; a club; specifically, a piece of wood with one end thicker or broader than the other, used in playing baseball, cricket, etc
5. (noun)bat one of the Cheiroptera, an order of flying mammals, in which the wings are formed by a membrane stretched between the elongated fingers, legs, and tail. The common bats are small and insectivorous. See Cheiroptera and Vampire
6. (verb)bat to strike or hit with a bat or a pole; to cudgel; to beat
7. (verb)bat to use a bat, as in a game of baseball