1 of 2


: being number 91 in a countable series
the ninety-first day
see Table of Numbers
: being one of 91 equal parts into which something is divisible
a ninety-first share of money


2 of 2


: number 91 in a countable series
: the quotient of a unit divided by 91 : one of 91 equal parts of something

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Dictionary Entries Near ninety-first

Cite this Entry

“Ninety-first.” Dictionary, Merriam-Webster, Accessed 21 Jul. 2024.

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