eighteenth

[ey-teenth]

adjective

1. next after the seventeenth; being the ordinal number for 18.

2. being one of 18 equal parts.

noun

1. an eighteenth part, especially of one (1/18).

2. the eighteenth member of a series.

Word History and Origins

Origin of eighteenth¹

before 900; Middle English eightenthe, eightethe, Old English eahtatēotha. See eighteen + -th ²

Example Sentences

It’s the negative image of an important intellectual movement of the seventeenth and eighteenth centuries, the Enlightenment, whose principles formed, among other things, the basis for American democracy.

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In the early eighteenth century, Georgia and Virginia used fines to penalize people for not voting.

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"Since women had no political position in the eighteenth century, I could not place this debate there," Wills told Salon.

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“We can quickly draft an agreement placing Ms. Martinez in a supervised group home until her eighteenth birthday.”

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Tykes forward Devante Cole poked home from close range for his eighteenth league goal of the season to give the visitors a sixth-minute lead.

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