ninety

[nahyn-tee] Example Sentences Origin

nine·ty

[nahyn-tee] noun, plural nine·ties, adjective
noun
1.
a cardinal number, ten times nine.
2.
a symbol for this number, as 90 or XC.
3.
a set of this many persons or things.
4.
nineties, the numbers, years, degrees, or the like, from 90 through 99, as in referring to numbered streets, indicating the years of a lifetime or of a century, or degrees of temperature: His grandmother is in her nineties.
adjective
5.
amounting to 90 in number.

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Ninety is always a great word to know.
So is doohickey. Does it mean:
a gadget; dingus; thingumbob.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.

Origin:
before 1000; Middle English nineti, Old English nigontig. See nine, -ty1
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Example Sentences
  • Ninety percent of the function of our site is based on suggestions from users.
  • In this hypothetical case, about ninety percent of people agree that it is morally permissible to turn the trolley.
  • Ninety percent of the northern snakehead's diet consists of other fish.
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Collins
World English Dictionary
ninety (ˈnaɪntɪ)
 
n , pl -ties
1.  See also number the cardinal number that is the product of ten and nine
2.  a numeral, 90, XC, etc, representing this number
3.  something represented by, representing, or consisting of 90 units
 
determiner
4.  a.  amounting to ninety: ninety times out of a hundred
 b.  (as pronoun): at least ninety are thought to be missing
 
[Old English nigontig]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

ninety
O.E. nigontig, from nine (q.v.) + -tig "group of ten" (see -ty (1)).
Online Etymology Dictionary, © 2010 Douglas Harper
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