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.

Nearby words

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. 2019

Examples from the Web for ninetieth

Neither retirement nor a ninetieth birthday slowed his publication rate.
The Best of Brit Lit|Peter Stothard|August 27, 2010|DAILY BEAST
On the evening of his ninetieth birthday the old man went up to his wife and kissed her.
The Empty House And Other Ghost Stories|Algernon Blackwood
I examined all my hives on the eighty-third day, and on the ninetieth day I found four swarms dead.
A Manual or an Easy Method of Managing Bees|John M. Weeks
It receives from the sun about one ninetieth of the light and heat that we get.
Other Worlds|Garrett P. Serviss

When we reached this point the One Hundred and Ninetieth was thrown forward in skirmish line.
In The Ranks|R. E. McBride
Mrs. Singleton is now in her ninetieth year but for some time past has been an invalid.
Lyman's History of old Walla Walla County, Vol. 2 (of 2)|William Denison Lyman

British Dictionary definitions for ninetieth

ninetieth

adjective

(usually prenominal)

being the ordinal number of ninety in numbering or counting order, position, time, etc. Often written: 90th
(as noun)the ninetieth in succession

noun

one of 90 approximately equal parts of something
(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

ninetieth

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