Eightieth Definition

ātē-ĭth
noun
The one following the seventy-ninth.
Webster's New World
The ordinal number matching the number 80 in a series.
American Heritage
Any one of the eighty equal parts of something;180
Webster's New World
The person or thing in the eightieth position.
Wiktionary
adjective
Preceded by seventy-nine others in a series; 80th.
Webster's New World
Designating any of the eighty equal parts of something.
Webster's New World

The ordinal form of the number eighty.

Wiktionary
Synonyms:
  • 80th
adverb
In the eightieth place, rank, group, etc.
Webster's New World

Other Word Forms of Eightieth

Noun

Singular:
eightieth
Plural:
eightieths

Origin of Eightieth

  • eighty +‎ -eth

    From Wiktionary

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eightieth