🔢 The number 18 🎂 Aged 18

eighteen

1.0

Being 18 years old

adjective
/ˈeɪˌtiːn/

: dieciocho

She is eighteen years old today.

Examples

I will turn eighteen next month!
There are eighteen students in the science club this year.
He has been playing chess since he was eighteen years old.
She bought eighteen roses for the anniversary celebration.
She is eighteen years old today.
He will turn eighteen next month!
There are eighteen students in the science club this year.

Synonyms

XVIII

vseighteen

2 4.8

A way to write the number eighteen using Roman numerals

is the word form rather than a Roman numeral representation

xviii

vseighteen

5.0

A Roman way to write the number eighteen

is the word form rather than a Roman numeral representation

How Many

thirty

∞ 1.0

twenty

∞ 1.0

eighteen

1.0

fifteen

561 1.0

ten

311 1.0

Surface Forms

eighteen positive

Morphology

eighteen = eight (transparent) = eight + teen

Adjectival use follows directly from the numeral base; '-teen' is a productive suffix in forming numbers in the teens.

Etymology

Eighteen comes from two simple parts: eight and teen, where teen originally meant 'ten'. So, eighteen literally means 'ten plus eight', which is why it names the number 18.