21

Questions about 21

What does 21 mean?

21 means "the cardinal number that is the sum of twenty and one". That is the primary sense; the word has 2 in total, listed in full on this page.

What is another word for 21?

Close synonyms include twenty-one, XXI, twenty-one, xxi. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is 21 a common word?

21 is banded "Familiar" — widely understood, used when the subject calls for it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.