thirty-first

American  

[thur-tee-furst] / ˈθɜr tiˈfɜrst /

adjective

1. next after the thirtieth; being the ordinal number for 31.

2. being one of 31 equal parts.

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noun

1. a thirty-first part, especially of one (1/31).

2. the thirty-first member of a series.

Example Sentences

Finland's application was processed in record time and it became the thirty-first member of the alliance earlier this month.

From Reuters • Apr. 19, 2023

Thus, every time you play “Disc 2: High Rise” you start on the thirty-first floor of a building and must make you way down.

From Washington Post • Mar. 14, 2019

On the thirty-first move, Carlsen, despite having a clearly better position—bearing down on Caruana’s king, with Caruana running out of time on the clock, a predicament known as “time trouble”—offered Caruana a draw.

From The New Yorker • Nov. 28, 2018

Anonymous doesn’t need to do anything on March thirty-first.

From Forbes • Feb. 16, 2012

We began school on the thirty-first day of the siege.

From "Homesick" by Jean Fritz