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twentieth

[twen-tee-ith, twuhn-]
adjective
  1. next after the nineteenth; being the ordinal number for 20.
  2. being one of 20 equal parts.
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noun
  1. a twentieth part, especially of one (1/20).
  2. the twentieth member of a series.
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Origin of twentieth

before 900; Middle English twentithe, Old English twentigotha. See twenty, -eth2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for twentieth

twentieth

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

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).

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Online Etymology Dictionary, © 2010 Douglas Harper