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thirtieth

[thur-tee-ith] /ˈθɜr ti ɪθ/
adjective
1.
next after the twenty-ninth; being the ordinal number for 30.
2.
being one of 30 equal parts.
noun
3.
a thirtieth part, especially of one (1/30).
4.
the thirtieth member of a series.
Origin of thirtieth
900
before 900; thirty + -eth2; replacing Middle English thrittythe, Old English thrītegtha
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for thirtieth
Historical Examples
  • Richard, to reach his thirtieth year, had traveled far by many a twisting road.

    The President Alfred Henry Lewis
  • She was one of those blondes who fade rapidly after their thirtieth year.

    Fruitfulness Emile Zola
  • For it is in 1461, in his thirtieth year, that Villon last writes down a verse.

    Avril H. Belloc
  • And now if ye will do battle, come again on the thirtieth day from hence.

    Cyropaedia Xenophon
  • Yes; poor child—nothing but a child—and yet in his thirtieth year!

    The Sand-Hills of Jutland Hans Christian Andersen
  • The Army of the Valley had its orders from Strasburg the night of the thirtieth.

    The Long Roll Mary Johnston
  • One day succeeded another until at length the morning of the thirtieth of June dawned.

    Frank's Campaign Horatio Alger, Jr.
  • The delusion holding, he, at noon of the thirtieth, ordered a general advance.

    The Long Roll Mary Johnston
  • Myra had now completed, or was on the point of completing, her thirtieth year.

    Endymion Benjamin Disraeli
  • The paper-knife generally ceased to do duty before the thirtieth page.

    The Library Andrew Lang
British Dictionary definitions for thirtieth

thirtieth

/ˈθɜːtɪɪθ/
adjective
1.
(usually prenominal)
  1. being the ordinal number of thirty in counting order, position, time, etc: often written 30th
  2. (as noun): the thirtieth of the month
noun
2.
  1. one of 30 approximately equal parts of something
  2. (as modifier): a thirtieth part
3.
the fraction equal to one divided by 30 (1/30)
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
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Word Origin and History for thirtieth

Middle English threttyth, from Old English þritigoða; see thirty + -th (1). Respelled 16c. to conform to new spelling of thirty.

Online Etymology Dictionary, © 2010 Douglas Harper
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Word Value for thirtieth

15
13
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