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We found 22 dictionaries with English definitions that include the word twenty-one: Click on the first link on a line below to go directly to a page where "twenty-one" is defined. General (18 matching dictionaries) twenty-one: American Heritage Dictionary of the English Language [home, info] twenty-one, twenty-one: Collins English Dictionary [home, info] twenty-one: Vocabulary.com [home, info] twenty-one: Merriam-Webster's Online Dictionary, 11th Edition [home, info] Twenty-One, Twenty-one, twenty-one: Wordnik [home, info] twenty-one: Wiktionary [home, info] twenty-one: Webster's New World College Dictionary, 4th Ed. [home, info] twenty-one: The Wordsmyth English Dictionary-Thesaurus [home, info] twenty-one: Infoplease Dictionary [home, info] twenty-one: Dictionary.com [home, info] twenty-one: UltraLingua English Dictionary [home, info] Twenty-One: Wikipedia, the Free Encyclopedia [home, info] twenty-one: Rhymezone [home, info] twenty-one: Free Dictionary [home, info] twenty-one: Mnemonic Dictionary [home, info] twenty-one: WordNet 1.7 Vocabulary Helper [home, info] twenty-one: LookWAYup Translating Dictionary/Thesaurus [home, info] twenty-one: Dictionary/thesaurus [home, info] Business (1 matching dictionary) twenty-one: Legal dictionary [home, info] Computing (1 matching dictionary) twenty-one: Encyclopedia [home, info] Slang (1 matching dictionary) twenty-one: Urban Dictionary [home, info] Sports (1 matching dictionary) Twenty-One: Card Games [home, info]

Quick definitions from WordNet (twenty-one) ▸ noun:  the cardinal number that is the sum of twenty and one ▸ noun:  a gambling game using cards; the object is to hold cards having a higher count than those dealt to the bank up to but not exceeding 21 ▸ adjective:  being one more than twenty