eighteenth
next after the seventeenth; being the ordinal number for 18.
being one of 18 equal parts.
an eighteenth part, especially of one (1/18).
the eighteenth member of a series.
Origin of eighteenth
1Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use eighteenth in a sentence
Add these together, and we find that the wine was seven-eighteenths of total fluid, and therefore the water eleven-eighteenths.
Amusements in Mathematics | Henry Ernest DudeneyThe faces of the volutes must recede from the edge of the abacus inwards by one and a half eighteenths of that same amount.
Ten Books on Architecture | Vitruvius
British Dictionary definitions for eighteenth
/ (ˈeɪˈtiːnθ) /
(usually prenominal)
coming after the seventeenth in numbering or counting order, position, time, etc; being the ordinal number of eighteen: often written 18th
(as noun): come on the eighteenth
one of 18 approximately equal parts of something
(as modifier): an eighteenth part
the fraction that is equal to one divided by 18 (1/18)
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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