eighteenth

[ ey-teenth ]
/ ˈeɪˈtinθ /

adjective

next after the seventeenth; being the ordinal number for 18.
being one of 18 equal parts.

noun

an eighteenth part, especially of one (1/18).
the eighteenth member of a series.

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WHO SAID IT: A QUIZ ON PRESIDENTIAL WIT AND WISDOM

Think you know your presidents? Take this quiz and see if you can match the style, wit, and ideology of these memorable lines to the right POTUS.
Question 1 of 9
“I do believe that the buck stops here, that I cannot rely upon public opinion polls to tell me what is right. I do believe that right makes might and that if I am wrong, 10 angels swearing I was right would make no difference.”

Origin of eighteenth

before 900; Middle English eightenthe, eightethe,Old English eahtatēotha.See eighteen + -th2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for eighteenth

British Dictionary definitions for eighteenth

eighteenth
/ (ˈeɪˈtiːnθ) /

adjective

(usually prenominal)
  1. coming after the seventeenth in numbering or counting order, position, time, etc; being the ordinal number of eighteen: often written 18th
  2. (as noun)come on the eighteenth

noun

  1. one of 18 approximately equal parts of something
  2. (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