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eightieth

[ey-tee-ith] /ˈeɪ ti ɪθ/
adjective
1.
next after the seventy-ninth; being the ordinal number for 80.
2.
being one of 80 equal parts.
noun
3.
an eightieth part, especially of one (1/80).
4.
the eightieth member of a series.
Origin
1350-1400
1350-1400; Middle English eightetithe, Old English (hund)eahtatigotha eightieth. See eighty, -th2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for eightieth
  • However, as she approaches her eightieth birthday next year, she has been having an easier time of it.
  • He was only a few weeks away from his eightieth birthday.
British Dictionary definitions for eightieth

eightieth

/ˈeɪtɪɪθ/
adjective
1.
(usually prenominal)
  1. being the ordinal number of eighty in numbering or counting order, position, time, etc: often written 80th
  2. (as noun): the eightieth in succession
noun
2.
  1. one of 80 approximately equal parts of something
  2. (as modifier): an eightieth part
3.
the fraction equal to one divided by 80 (1/80)
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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16
15
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