Definition of bat noun from the Oxford Advanced American Dictionary

     

    bat

     noun
    noun
    NAmE//bæt//
     
     
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  1. 1a piece of wood with a handle, made in various shapes and sizes, and used for hitting the ball in games such as baseball a baseball bat compare racket
  2. 2an animal like a mouse with wings, that flies and feeds at night (= it is nocturnal ). There are many types of bats. see also fruit bat, vampire bat
  3. Idioms
    1. 1(in baseball)
    2. 2trying to hit the ball with a bat It's his first time at bat in the major leagues.
    3. 3 at-bat an occasion when a player is trying to hit the ball with a bat Who had the most at-bats last season?
    (as) blind as a bat(humorous)
     
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    not able to see well She's as blind as a bat without her glasses.
    have bats in the/your belfry(informal)(old-fashioned)
     
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    to be strange or crazy
    like a bat out of hell(informal)
     
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    very fast She was driving like a bat out of hell.
    right off the bat(informal)
     
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     immediately; without delay We liked each other right off the bat. The threat of a strike is one of the issues we have to deal with right off the bat.
See the Oxford Advanced Learner's Dictionary entry: bat