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Definition of eighteenth

eighteenth

/ˌeɪˈtiːnθ/
eight · eenth

Plural:eighteenths
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eighteenth Lexical Profile

eighteenth Game Scores & Validity

• adjective

1

Constituting number eighteen in a sequence; coming immediately after the seventeenth in position or order.

Example

"The Enlightenment was a major intellectual movement during the eighteenth century."


2

Constituting one of eighteen equal parts into which a whole may be divided.

Example

"Each heir was entitled to an eighteenth share of the family estate."

• noun

1

The person or thing in position number eighteen in a countable series, or the eighteenth day of a month.

Example

"Her birthday falls on the eighteenth of October."


2

One of eighteen equal parts of a divisible whole.

Example

"A single hole represents one eighteenth of a standard golf round."

• Rhymes for eighteenth

Word Origin & Etymology

From Middle English eightetethe, from Old English eahtateotha, formed from eahtatiene ('eighteen') and the ordinal suffix -tha.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Eighteenth. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/eighteenth
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