The decade of the 1820s, 1920s, 2020s, etc. / The decade of one's life from age 20 through age 29. / (temperature, rates, plural only) The range between 20 and 29.

plural of twenty

From or evoking the 21st through 30th years of a century (chiefly the 1920s).

Having normal visual acuity.

Obsolete spelling of twenty

(colloquial) A banknote with a denomination of 20. / (CB slang) 10-20 (location). / (UK, historical, military) An old English division of infantry.

The cardinal number 20, occurring after nineteen and before twenty-one.

A hamlet in Bourne parish, South Kesteven district, Lincolnshire, England (OS grid ref TF1520).

(historical) Five-twenty bonds of the United States (bearing six per cent interest), issued in 1862, '64, and '65, redeemable after five and payable in twenty years.

The 1920s, referring to the rapid economic expansion and modernization of the period.