Onetiesnoun
(nonce) The second decade of a century: the 1910s, the 2010s, etc. The tens.
Twentiesnoun
plural of twenty
Twentiesnoun
The decade of the 1820s, 1920s, 2020s, etc.
Twentiesnoun
The decade of one's life from age 20 through age 29.
βThe waiter was in his twenties.β;
Twentiesnoun
the time of life between 20 and 30
Twentiesnoun
the decade from 1920 to 1929