[twen-tee-ith, twuhn-]


next after the nineteenth; being the ordinal number for 20.
being one of 20 equal parts.


a twentieth part, especially of one (1/20).
the twentieth member of a series.

Origin of twentieth

before 900; Middle English twentithe, Old English twentigotha. See twenty, -eth2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Contemporary Examples of twentieth

Historical Examples of twentieth

British Dictionary definitions for twentieth



(usually prenominal)
  1. coming after the nineteenth in numbering or counting order, position, time, etc; being the ordinal number of twenty: often written 20th
  2. (as noun)he left on the twentieth


  1. one of 20 approximately equal parts of something
  2. (as modifier)a twentieth part
the fraction that is equal to one divided by 20 (1/20)

Word Origin for twentieth

from Old English twentigotha
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 twentieth

Old English twentigoða; see twenty + -th (1).

Online Etymology Dictionary, © 2010 Douglas Harper