eightieth

1 of 2

adjective

eight·​i·​eth ˈāt|ēə̇th 

ˈāt|, 

|iə̇th

1

: being number 80 in a countable series

the eightieth day

see Table of Numbers

2

: being one of 80 equal parts into which something is divisible

an eightieth share of the money

eightieth

2 of 2

noun

"

plural -s

1

: number 80 in a countable series

2

: the quotient of a unit divided by 80 : one of 80 equal parts of something

one eightieth of the total

Word History

Etymology

Adjective

Middle English eightetithe, eightithe, adjective & noun, from Old English hundeahtatigotha, from hundeahtatig eighty + -otha -tha -th

Noun

Middle English eightetithe, eīghtithe

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