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Definition of Thirty-one
1. Adjective. Being one more than thirty. 
Definition of Thirty-one
1. Cardinal numeral. The cardinal number immediately following thirty and before thirty-two; thirty plus one. ¹
¹ Source: wiktionary.com
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1. Adjective. Being one more than thirty. 
1. Cardinal numeral. The cardinal number immediately following thirty and before thirty-two; thirty plus one. ¹
¹ Source: wiktionary.com