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We found 8 dictionaries that include the word 21st:

General (8 matching dictionaries)

1. 21st: Vocabulary.com [home, info]
2. 21st: Wordnik [home, info]
3. 21st: Wiktionary [home, info]
4. 21st: Dictionary.com [home, info]
5. 21st: Rhymezone [home, info]
6. 21st: Free Dictionary [home, info]
7. 21st: Mnemonic Dictionary [home, info]
8. 21st: LookWAYup Translating Dictionary/Thesaurus [home, info]

Quick definitions from WordNet (21st) ▸ adjective:  coming next after the twentieth in position ▸ Words similar to 21st ▸ Usage examples for 21st ▸ Popular nouns described by 21st ▸ Words that often appear near 21st ▸ Rhymes of 21st ▸ Invented words related to 21st