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

     

    barn

     noun
    noun
    BrE BrE//bɑːn//
     
    ; NAmE NAmE//bɑːrn//
     
    Buildings, On the farm, Animal homes, Animal farming
     
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  1. 1a large farm building for storing grain or keeping animals in a hay barn They live in a converted barn (= a barn that has been turned into a house). Wordfinderarable, barn, crop, cultivate, dairy, fallow, farm, graze, livestock, tractor see also Dutch barn See related entries: Buildings, On the farm, Animal homes, Animal farming
  2. 2a large plain ugly building They live in a great barn of a house.
  3. 3(North American English) a building in which buses, trucks, etc. are kept when not being used See related entries: Buildings
  4. Word Origin Old English bern, berern, from bere ‘barley’ + ern, ærn ‘house’.Idioms
    close, etc. the barn door after the horse has escaped(North American English)(British English close, etc. the stable door after the horse has bolted)
     
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    to try to prevent or avoid loss or damage when it is already too late to do so
See the Oxford Advanced American Dictionary entry: barn