eighteenth

[ ey-teenth ]

/ ˈeɪˈtinθ /

Save This Word!

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.

QUIZ

WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?

Smoothly step over to these common grammar mistakes that trip many people up. Good luck!

Question 1 of 7

Fill in the blank: I can’t figure out _____ gave me this gift.

who

whom

TAKE THE QUIZ TO FIND OUT

Origin of eighteenth

before 900; Middle English eightenthe, eightethe,Old English eahtatēotha.See eighteen + -th²

Words nearby eighteenth

Eiger, eight, eightball, eighteen, eighteenmo, eighteenth, Eighteenth Amendment, eighteen-wheeler, eightfold, Eightfold Path, Eightfold Way

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use eighteenth in a sentence

They also hope to push their estimates further back in time by examining wood samples from trees that were cut down in the eighteenth and nineteenth centuries.
300 years of tree rings show just how badly hurricanes have soaked the Carolinas|Kate Baggaley|October 5, 2021|Popular-Science
In the photo, Sherman stands, dressed in an elaborate embroidered velvet frock coat and vest from the late eighteenth century.
Bill Cunningham: Through the Lens of a Style King|Justin Jones|March 14, 2014|DAILY BEAST
Eighteenth-ranked Michigan might be 8-4, but its road record is 1-4.
The Dummies’ Guide to College Football Bowl Games|Sujay Kumar|January 1, 2013|DAILY BEAST
I can't rebuild my apartment on the fifth floor while you keep your apartment on the eighteenth floor just as it is.
Hell, No, Not So Low|Megan McArdle|October 16, 2012|DAILY BEAST

William Blake, the eighteenth century poet, illustrator, engraver and mystic, worked from home but lived in his imagination.
William Blake's Heavenly Imagination|Chloe Malle|November 12, 2009|DAILY BEAST
When they took us for the march,” Pearl goes on, “it was our birthday: January eighteenth.
Dr. Mengele's Twins|Abigail Pogrebin|October 28, 2009|DAILY BEAST
The "new world" was really found in the wonder-years of the eighteenth and early nineteenth centuries.
The Unsolved Riddle of Social Justice|Stephen Leacock
They gave a sort of daring unconscious eighteenth-century coquetry to what was otherwise a somewhat severe style of beauty.
Ancestors|Gertrude Atherton
The mixture was washed on the eighteenth of the said month, and a small grain of gold, weighing one-half real, was obtained.
The Philippine Islands, 1493-1898, Volume XX, 1621-1624|Various
In England the violin makers in the beginning of the eighteenth century, mostly copied the pattern and model of Steiner.
Violins and Violin Makers|Joseph Pearce
In the Eighteenth Century repairs and additions were made by the celebrated Cliquot.
The Recent Revolution in Organ Building|George Laing Miller

British Dictionary definitions for eighteenth

eighteenth

/ (ˈeɪˈtiːnθ) /

adjective

(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

noun

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