Eighteen (noun)

The cardinal number occurring after seventeen and before nineteen.

Origin:

From middle english eightetene, from old english eahtatēne, from proto-germanic *ahtatēhuniz, compound of *ahto (“eight”) + *tēhuniz (“ten”).

Examples:

1. There are eighteen holes on a standard golf course.
2. The legal age to vote in most countries is eighteen.
3. My birthday is on the eighteenth of June.
4. The game ended in a tie score of two to eighteen.
5. The winning team scored a total of eighteen points in the first quarter.