Definition of feather noun from the Oxford Advanced American Dictionary

  

feather

 noun
noun
NAmE//ˈfɛðər//
 
 
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  •   one of the many soft, light parts covering a bird's body a peacock feather a feather pillow (= one containing feathers)
  • Idioms
    birds of a feather (flock together)(saying)
     
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    people of the same sort (are found together)
    a feather in your cap
     
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    an action that you can be proud of This idiom comes from the Native American custom of giving a feather to someone who had been very brave in battle.
    ruffle somebody's/a few feathers(informal)
     
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    to annoy or upset someone or a group of people The senator's speech ruffled a few feathers in the business world.
    smooth (somebody's) ruffled feathers
     
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    to make someone feel less angry or offended
    you could have knocked me down with a feather(informal)
     
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    used to express surprise
    See the Oxford Advanced Learner's Dictionary entry: feather