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Definition of eightieth

eightieth

/ˈeɪ.ti.əθ/
eigh · ti · eth
Plural:eightieths
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eightieth Lexical Profile

eightieth Game Scores & Validity

• adjective

1

Constituting number eighty in a sequence; coming immediately after the seventy-ninth in order.

Example

"The entire extended family gathered to celebrate her grandmother's eightieth birthday."

2

Being one of eighty equal parts into which a whole is divided.

Example

"Each investor received an eightieth share of the company's annual dividends."

• noun

1

The person or thing in the position of number eighty in a sequence.

Example

"His application was the eightieth to be processed by the admissions office that morning."

2

One of eighty equal parts of a whole.

Example

"A single millimeter is one eightieth of the width of that wooden beam."

• Nearby Words

eighth
eighthly
eighties
eightieth
eighty
eightyfold
eindhoven

Word Origin & Etymology

From Middle English eightetithe, altered by analogy with eighty from Old English hundeahtatigotha, formed from hundeahtatig ('eighty') and the ordinal suffix -otha ('-th').

Cite this Entry

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