twenty · number /ˈtwen.ti/Full view
twenty
A1 the number 20
Dictionary examples:

nineteen, twenty, twenty-one

space for twenty people

Learner example:

I think we were twenty people. (Key English Test; A2; Italian)

(be) in your twenties
B2 to be aged between 20 and 29
Dictionary example:

Most of the staff are in their twenties.

Learner example:

Teenagers and people in their twenties will enjoy themselves in the atmosphere of the rock-café. (First Certificate in English; B2; Russian)

the twenties
B2 the years from 1920-1929
Dictionary example:

I love the fashions of the twenties.

Learner example:

You can find the car [that] won the first car race in the world, [and] lost movies from the twenties. (First Certificate in English; B2; Spanish)

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