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

     

    down

     noun
    noun
    BrE BrE//daʊn//
     
    ; NAmE NAmE//daʊn//
     
    see also downs Describing hair, Parts of animals, American football, Facial hair
     
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  1. 1[uncountable] the very fine soft feathers of a bird duck down See related entries: Parts of animals
  2. 2[uncountable] fine soft hair see also downy See related entries: Describing hair, Facial hair
  3. 3[countable] (in American football) one of a series of four chances to carry the ball forward ten yards that a team is allowed. These series continue until the team loses the ball or fails to go forward ten yards in four downs. See related entries: American football
  4. Word Originnoun Middle English: from Old Norse dúnn.Idioms
    have a down on somebody/something
     
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    (British English, informal) to have a bad opinion of a person or thing
    the mixture of good and bad things in life or in a particular situation or relationship Every business has its ups and downs.
See the Oxford Advanced American Dictionary entry: down