Definition of "fifty-first" [fifty-first]

• The ordinal form of the number fifty-one, describing a person or thing in position number 51 of a sequence. (noun)
• One of fifty-one equal parts of a whole. (noun)

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• "Did Rilke know that he would die in his fifty-first year?"
• "In testimony whereof, the said Lewis Cass, James B. Ray, and John Tipton, commissioners as aforesaid, and the chiefs and warriors of the said Potawatamie tribe have hereunto set their hands, at the Wabash, on the sixteenth day of October, in the year of our Lord one thousand eight hundred and twenty-six, and of the independence of the United States the fifty-first."
• "It is about time we stop treating Israel as the fifty-first state."