Twenty-first

Full definition of twenty-first

Adjective

1. The ordinal form of the number twenty-one.

Abbreviations

Noun

1. The person or thing in the twenty-first position.
2. One of twenty-one equal parts of a whole, usually written $\backslash textstyle\backslash frac\{1\}\{21\}$.
3. (informal) A party to celebrate a twenty-first birthday.

Synonyms

• twenty-oneth