Hello, you have come here looking for the meaning of the word 二十一. In DICTIOUS you will not only get to know all the dictionary meanings for the word 二十一, but we will also tell you about its etymology, its characteristics and you will know how to say 二十一 in singular and plural. Everything you need to know about the word 二十一 you have here. The definition of the word 二十一 will help you to be more precise and correct when speaking or writing your texts. Knowing the definition of二十一, as well as those of other words, enriches your vocabulary and provides you with more and better linguistic resources.