ninetieth

[nahyn-tee-ith]

adjective

next after the eighty-ninth; being the ordinal number for 90.
being one of 90 equal parts.

noun

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

Origin of ninetieth

before 1100; Middle English nyntithe, Old English nigenteotha. See ninety, -eth²

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ninetieth

Contemporary Examples of ninetieth

Neither retirement nor a ninetieth birthday slowed his publication rate.
The Best of Brit Lit
Peter Stothard
August 27, 2010

Historical Examples of ninetieth

He died at Rome, on February 18, 1564, in the ninetieth year of his age.
Great Men and Famous Women, Vol. 8 (of 8)
Various
The colonel of the Ninetieth Rhode Island fell at twenty-two.
Special Messenger
Robert W. Chambers
In full-front view he did not look like a man in his ninetieth year.
In and Around Berlin
Minerva Brace Norton
Theophrastus began his "Character of Man" on his ninetieth birthday.
Genius in Sunshine and Shadow
Maturin Murray Ballou
He began it in his fortieth year, and did not finish it until his ninetieth .
The Queer, the Quaint and the Quizzical
Frank H. Stauffer

British Dictionary definitions for ninetieth

ninetieth

adjective

(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

noun

1. one of 90 approximately equal parts of something
2. (as modifier)a ninetieth part
the fraction equal to one divided by 90 (1/90)

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for ninetieth

late 14c., nyntithe; see ninety + -th (1). Replaced Old English nigenteoþan.