Definition of powder noun from the Oxford Advanced American Dictionary

      

    powder

     noun
    noun
    NAmE//ˈpaʊdər//
     
     
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  1. 1 [uncountable, countable] a dry mass of very small fine pieces or grains chili powder lumps of chalk crushed to (a) fine white powder The snow was like powder. A wide range of cleaning fluids and powders is available. see also baking powder, curry powder, talcum powder
  2. 2[uncountable] a very fine, soft, dry substance that you can put on your face to make it look smooth and dry I only use lipstick and a little powder.
  3. 3[uncountable] = gunpowder
  4. Idioms
    keep your powder dry(old-fashioned)
     
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    to remain ready for a possible emergency
    take a powder(informal)
     
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    to leave suddenly; to run away
See the Oxford Advanced Learner's Dictionary entry: powder