eighteen

American  

[ey-teen] / ˈeɪˈtin /

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 British  

/ 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

Etymology

Origin of eighteen

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

Example Sentences

In that time, he has become one of the biggest figures in children's literature – with his books selling eighteen million copies.

From BBC

A VOA spokesperson told the BBC it had engaged with Eurotunnel and their advisers "on multiple occasions over the past eighteen months to discuss their valuation and fully explain our approach".

From BBC

In 1859, a message found by a search party on King William Island stated that both the Erebus and the Terror were trapped in ice in late 1846 and remained so for about eighteen months.

From Literature

“I am eighteen years old, and I live with my sister Constance. . . . Everyone else in my family is dead.”

From The Wall Street Journal

In eighteen hours, it would hit the Sulzberger Ice Shelf in Antarctica, where it would knock loose an iceberg twice the size of Manhattan.

From Literature