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[fif-teenth] /ˈfɪfˈtinθ/
next after the fourteenth; being the ordinal number for 15.
being one of 15 equal parts.
a fifteenth part, especially of one (1/15).
the fifteenth member of a series.
Music. the interval of two octaves.
Origin of fifteenth
before 900; Middle English fiftenthe (see fifteen, -th2); replacing Middle English fiftethe, Old English fīftēotha Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for fifteenth
Contemporary Examples
Historical Examples
  • I was on the eve of my fifteenth birthday, and I was in a state of expectation as to the future of my life.

    My Double Life Sarah Bernhardt
  • Let her read Timothy chapter two, ninth to fifteenth verses.'

    Micah Clarke Arthur Conan Doyle
  • On the fifteenth of September the British made the move that was expected.

    The Dare Boys of 1776 Stephen Angus Cox
  • On the fifteenth, the States of the Province will be reassembled.

  • These had nearly reached their culmination in the middle of the fifteenth century.

    Two Penniless Princesses Charlotte M. Yonge
  • It was on the fifteenth of the month, when she happened to take up the morning paper.

    Victor's Triumph Mrs. E. D. E. N. Southworth
  • You admit that you married Miss Cavendish on the fifteenth of last February?

    Victor's Triumph Mrs. E. D. E. N. Southworth
British Dictionary definitions for fifteenth


  1. coming after the fourteenth in order, position, time, etc. Often written: 15th
  2. (as noun): the fifteenth of the month
  1. one of 15 equal or nearly equal parts of something
  2. (as modifier): a fifteenth part
the fraction equal to one divided by 15 (1/15)
  1. an interval of two octaves
  2. one of two notes constituting such an interval in relation to the other, esp the one higher in pitch
  3. an organ stop of diapason quality sounding a note two octaves higher than that normally produced by the key depressed; a two-foot stop
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 fifteenth

late 14c., from fifteen + -th (1). By 15c. displacing forms derived from Old English fifteoða. Cf. Old Frisian fiftuda, Dutch vijftiende, German fünfzehnte, Old Norse fimmtandi, Gothic fimftataihunda.

Online Etymology Dictionary, © 2010 Douglas Harper
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