- a cardinal number, ten plus eight.
- a symbol for this number, as 18 or XVIII.
- a set of this many persons or things.
- amounting to 18 in number.
Origin of eighteen
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for eighteen
In November 1885, the sudden death of her eighteen year-old daughter, Annie, brought Mandelbaum back to New York City.Meet 'The Queen of Thieves' Marm Mandelbaum, New York City's First Mob Boss
J. North Conway
September 7, 2014
By 1953, the number of Americans owning their own homes climbed to twenty-five million, up from eighteen million in 1948.In the Future We'll All Be Renters: America's Disappearing Middle Class
August 10, 2014
Eighteen years old, and got hit with an IED his first month there.Who Has the Right to Write About War?
Emily Gray Tedrowe
July 12, 2014
It takes eighteen months to two years until it gets decent-sized.A Briny, South Carolina Oyster Shack
Jane & Michael Stern
March 23, 2014
Upon retirement, the average corrections officer will survive eighteen months.Detention Worker Stands Up for Prisoners’ Rights
March 12, 2014
"It is eighteen years since I was last in this room," he said.
That's a scurvy welcome to give a nephew you haven't seen for eighteen years.
We are said to be like, but she is much younger—only eighteen.
Eighteen seventy-nine: it was the year her father lost his money.
That was the beginning of her illness, February, eighteen eighty-three.
- the cardinal number that is the sum of ten and eight and the product of two and nineSee also number (def. 1)
- a numeral, 18, XVIII, etc, representing this number
- the amount or quantity that is eight more than ten
- something represented by, representing, or consisting of 18 units
- (functioning as singular or plural) a team of 18 players in Australian Rules football
- amounting to eighteeneighteen weeks
- (as pronoun)eighteen of them knew
Old English eahtatēne; related to Old Norse attjan, Old High German ahtozehan
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
Word Origin and History for eighteen
Online Etymology Dictionary, © 2010 Douglas Harper