Try Our Apps


Supposedly vs. Supposably


[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. 2015.
Cite This Source
Examples from the Web for fifteenth
Contemporary Examples
Historical Examples
  • It is a composition of the fifteenth century, but the author is unknown.

  • In the fifteenth century all wanted it, and were ready to do anything to get it.

    Folkways William Graham Sumner
  • Centuries take a lower-case letter: fifteenth century, nineteenth, twentieth, etc.

    The Magazine Style-Code Leigh H. Irvine
  • They reappeared from time to time through the fourteenth and fifteenth centuries.

    Folkways William Graham Sumner
  • Until the fifteenth century the Prior of Plympton controlled the affairs of Plymouth.

    Devonshire Francis A. Knight
  • The sottie, like the Morality, was a creation of the fifteenth century.

  • A fortnight more, and, on the seventh of the month, Ivan would enter his fifteenth year.

    The Genius Margaret Horton Potter
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
Cite This Source
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
Cite This Source

Word of the Day

Difficulty index for fifteenth

Many English speakers likely know this word

Word Value for fifteenth

Scrabble Words With Friends