Definition

The number that comes after seventeen and before nineteen, represented by the numeral 18.

Example

She turned eighteen last week and is now officially an adult.

Conversation

Did you know that I turned eighteen last week?

Wow, that's awesome! How does it feel to be an adult?

It feels pretty cool, but also a bit scary.

I can imagine! Welcome to the world of eighteen and all its responsibilities!

Synonyms & Antonyms

Root Explanation

Eighteen → The word 'eighteen' comes from the Old English 'eahtatiene', which is a combination of 'eahta' (meaning eight) and 'tiene' (meaning ten). Thus, 'eighteen' literally means eight plus ten.

Memory Tip

Think of the number eight ('eahta') and then add ten ('tiene') to remember that eighteen is eight plus ten.

Visually Confused Words