American English

Definition of eighty number from the Oxford Advanced American Dictionary



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  1. 1number 80
  2. 2noun the eighties [plural] numbers, years, or temperatures from 80 to 89
  3. Idioms
    in your eighties
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    between the ages of 80 and 89
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: eighty

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