- next after the ninetieth; being the ordinal number for 91.
- being one of 91 equal parts.
- a ninety-first part, especially of one (1/91).
- the ninety-first member of a series.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for ninety-first
The allusion is to Sir Christopher Wren, who died in 1723, in his ninety-first year.The Tatler, Volume Two
The One Hundred and Ninety-first was on our left, beyond the battery.In The Ranks
R. E. McBride
This book, in 1895, is in its ninety-first edition of one thousand copies.
Since then she has revised it many times, and the ninety-first edition is announced.
At that epoch, Father Gillenormand was well past his ninety-first birthday.Les Misrables