twenty-one ( synonym found)
Definition of twenty-one:

°The cardinal number occurring after twenty and before twenty-two, represented in Roman numerals as XXI and in Arabic numerals as 21. Ordinal: twenty-first.
°(Card games) Another name for blackjack.
Definition of twenty-one:

°The cardinal number occurring after twenty and before twenty-two, represented in Roman numerals as XXI and in Arabic numerals as 21. Ordinal: twenty-first.
°(Card games) Another name for blackjack.
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