| English adjective: 21 | |||
| 1. | 21 being one more than twenty | ||
| Synonyms | twenty-one, xxi | ||
| Similar | cardinal | ||
| Antonyms | ordinal | ||
| English noun: 21 | |||
| 1. | 21 (quantity) the cardinal number that is the sum of twenty and one | ||
| Synonyms | twenty-one, XXI | ||
| Broader (hypernym) | large integer | ||