Definition of "twenty-first" []

• The ordinal form of the number twenty-one. (adjective)
• The person or thing in the twenty-first position. (noun)
• One of twenty-one equal parts of a whole, usually written . (noun)
• A party to celebrate a twenty-first birthday. (noun)

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• "Since the early twenty-first century, lol has been a must-have abbreviation.1 Devised by internet users, it conveys mirth—“laughing out loud”—that is invisible and inaudible in purely onscreen interaction."
• "One example among many is found in the dialogue between Ethiopian and American musicians: jazz in the United States inspired Ethiopian jazz artists of the 1970s, which prompted interpretations by American artists of the early twenty-first century, which has led to collaborations between Ethiopians and Americans."
• "And so, even in the twenty-first century, anyone hoping to master reading and writing English must set aside plenty of time to learn—largely by rote memory—standard spellings that seem to be as closely guided by pronunciation as the former planet Pluto is by Play-Doh."