eighteen

[ ey-teen ]

noun

1. a cardinal number, ten plus eight.
2. a symbol for this number, as 18 or XVIII.
3. a set of this many persons or things.

adjective

1. amounting to 18 in number.

eighteen

/ ˈeɪˈtiːn /

noun

1. the cardinal number that is the sum of ten and eight and the product of two and nine See also number
2. a numeral, 18, XVIII, etc, representing this number
3. the amount or quantity that is eight more than ten
4. something represented by, representing, or consisting of 18 units
5. functioning as singular or plural a team of 18 players in Australian Rules football

determiner

1. 1. amounting to eighteen

      eighteen weeks

   2. ( as pronoun )

      eighteen of them knew

Word History and Origins

Origin of eighteen¹

before 1000; Middle English ehtetene, Old English eahtatēne; cognate with Old Norse āttjān, German achtzehn. See eight, -teen

Word History and Origins

Origin of eighteen¹

Old English eahtatēne; related to Old Norse attjan, Old High German ahtozehan

Example Sentences

He travelled eighteen miles but only after ejecting every loose object from the balloon to enable it to launch.

From Salon

But it will be a long time before any of this is resolved - it has already taken eighteen months to get to this point, and no court date has been set.

From BBC

“We have reason to believe they enrolled in area boarding schools sometime in the past eighteen months and wondered if the girl ended up here.”

From Literature

“The goal wasn’t to win. We were trying to have the longest game of freeze tag in history, remember? And that only lasted eighteen minutes.”

From Literature

In mice, this can be a period of up to eighteen months, while in humans it can last almost half a century, the average time between birth and menopause.

From Science Daily