What is the meaning of Twenty?

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

The numbers twenty (20) to twenty-nine (29).

A banknote with a denomination of 20.

10-20 (location).

An old English division of infantry.

twenty (the cardinal number 20, occurring after nineteen and before twenty-one)

twenty (the cardinal number 20, occurring after nineteen and before twenty-one)

alternative form of twinty

Source: wiktionary.org