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fortieth

[ fawr-tee-ith ]
/ ˈfɔr ti ɪθ /
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adjective
next after the thirty-ninth; being the ordinal number for 40.
being one of 40 equal parts.
noun
a fortieth part, especially of one (1/40).
the fortieth member of a series.
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Origin of fortieth

before 1100; Middle English fourtithe,Old English fēowertigotha.See forty, -eth2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use fortieth in a sentence

British Dictionary definitions for fortieth

fortieth
/ (ˈfɔːtɪɪθ) /

adjective
  1. being the ordinal number of forty in numbering or counting order, position, time, etc. Often written: 40th
  2. (as noun)he was the fortieth
noun
  1. one of 40 approximately equal parts of something
  2. (as modifier)a fortieth part
the fraction equal to one divided by 40 (1/40)

Word Origin for fortieth

Old English fēowertigotha
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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