ninetieth

American  

[nahyn-tee-ith] / ˈnaɪn ti ɪθ /

adjective

1. next after the eighty-ninth; being the ordinal number for 90.

2. being one of 90 equal parts.

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noun

ninetieths plural

1. a ninetieth part, especially of one (1/90).

2. the ninetieth member of a series.

ninetieth British  

/ ˈnaɪntɪɪθ /

adjective

1. (usually prenominal)

   1. being the ordinal number of ninety in numbering or counting order, position, time, etc. Often written: 90th

   2. ( as noun )

      the ninetieth in succession

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noun

1. 1. one of 90 approximately equal parts of something

   2. ( as modifier )

      a ninetieth part

2. the fraction equal to one divided by 90 ( 1/ 90 )

Other Word Forms

Noun Inflected Forms

• ninetieths
  plural

Etymology

Origin of ninetieth

before 1100; Middle English nyntithe, Old English nigenteotha. See ninety, -eth ²

Example Sentences

See Examples For:

ninetieth ninetieths

Now, strangely, I draw breath Well past my ninetieth.

From New York Times ● Jan. 9, 2023

Since 1989, a household at the tenth percentile is barely better off, while a household at the ninetieth percentile has almost one-third more income.

From Salon ● Dec. 1, 2019

I told him I was enlisting to go with him on his ninetieth birthday parachute jump.

From New York Times ● Dec. 2, 2018

Only here did I feel strongly the spirit of Boulez, who marked his ninetieth birthday on March 26th.

From The New Yorker ● Apr. 13, 2015

"Lord Walder is well, my lady. He plans to take a new wife on his ninetieth name day, and has asked your lord father to honor the wedding with his presence."

From "A Game of Thrones" by George R.R. Martin

This is why those accounts stand in dollars and ninetieths, a notation so puzzling to many.

From History of the United States, Volume 2 by Andrews, Elisha Benjamin