American English

Definition of sixty number from the Oxford Advanced American Dictionary



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  1. 1number 60
  2. 2noun the sixties [plural] numbers, years, or temperatures from 60 to 69
  3. Idioms
    in your sixties
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    between the ages of 60 and 69
ordinal number, noun There are examples of how to use ordinal numbers at the entry for fifth.
See the Oxford Advanced Learner's Dictionary entry: sixty