/ ˈtwenti; NAmE / number
1.
20
2.
noun the twenties [ pl. ] numbers, years or temperatures from 20 to 29
► twen·ti·eth / ˈtwentiəθ/ ordinal number , noun
HELP NOTE : There are examples of how to use ordinal numbers at the entry for fifth .
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IDIOMS
- in your twenties
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WORD ORIGIN
Old English twentig , from the base of two + -ty .