Definition of "thirty-first" [thirty-first]

The ordinal form of the number thirty-one, describing a person or thing in position number 31 of a sequence. (noun)
One of thirty-one equal parts of a whole. (noun)

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Use "thirty-first" in a sentence

"Yet my college diploma says, “Given at Hempstead, New York, this thirty-first day of May, one thousand nine hundred AND eighty-nine.”"
"In his thirty-first year as mayor, hubbard had forced Southenders to sell their houses to the city of Dearborn by using a variety of tactics."
"The Green Movement is alive and well, and by some accounts gaining momentum, despite the poor showing on February 11th, the thirty-first anniversary of the Islamic Revolution."

Words like "thirty-first"

200th 50th eightieth

fortieth forty-ninth forty-third

ordinal thirtieth twenty-eighth

twenty-first twenty-seventh twenty-third