Definition of bat noun from the Oxford Advanced Learner's Dictionary

     

    bat

     noun
    noun
    BrE BrE//bæt//
     
    ; NAmE NAmE//bæt//
     
    Baseball, Wild mammals, Cricket
     
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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, cricket and table tennis a baseball/cricket bat compare racket See related entries: Baseball, Cricket
  2. 2 an animal like a mouse with wings, that flies and feeds at night (= it is nocturnal). There are many types of bat. see also fruit bat, old bat, vampire bat See related entries: Wild mammals
  3. Word Originnoun sense 1 late Old English batt ‘club, stick, staff’, perhaps partly from Old French batte, from battre ‘to strike’. noun sense 2 late 16th cent.: alteration, perhaps by association with medieval Latin batta, blacta, of Middle English bakke, of Scandinavian origin.Idioms (humorous) not able to see well She’s as blind as a bat without her glasses. More Like ThisSimiles in idioms (as) bald as a coot, (as) blind as a bat, (as) bright as a button, (as) bold as brass, as busy as a bee, as clean as a whistle, (as) dead as a/​the dodo, (as) deaf as a post, (as) dull as ditchwater, (as) fit as a fiddle, as flat as a pancake, (as) good as gold, (as) mad as a hatter/​a March hare, (as) miserable/​ugly as sin, as old as the hills, (as) pleased as Punch, as pretty as a picture, (as) regular as clockwork, (as) quick as a flash, (as) safe as houses, (as) sound as a bell, (as) steady as a rock, (as) thick as two short planks, (as) tough as old bootsSee worksheet. (informal) very fast She was driving like a bat out of hell. (British English, informal) if you do something off your own bat, it is your own idea and you do it without help or encouragement from anyone else She made the suggestions entirely off her own bat. (informal, especially North American English) immediately; without delay We both liked each other right off the bat. Foreign aid is one of the issues we have to deal with right off the bat.
See the Oxford Advanced American Dictionary entry: bat