Definition of six number from the Oxford Advanced American Dictionary

 

six

 number
number
NAmE//sɪks//
 
 
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  • 6 There are examples of how to use numbers at the entry for five.
  • Idioms
    be six feet under(informal)
     
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    to be dead and in a grave
    it's six of one and half a dozen of the other(saying)
     
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    used to say that there is not much real difference between two possible choices
    See the Oxford Advanced Learner's Dictionary entry: six