- 1number 20
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- 2noun the twenties [plural] numbers, years, or temperatures from 20 to 29 Idioms
between the ages of 20 and 29
NAmE//ˈtwɛntiəθ//, NAmE//ˈtwɛniəθ//, NAmE//ˈtwʌniəθ//
ordinal number, noun There are examples of how to use ordinal numbers at the entry for fifth.See twenty in the Oxford Advanced Learner's DictionaryCheck pronunciation: twenty