eightieth

[ ey-tee-ith ]

adjective

1. next after the seventy-ninth; being the ordinal number for 80.
2. being one of 80 equal parts.

noun

1. an eightieth part, especially of one (1/80).
2. the eightieth member of a series.

ˈeightieth

/ ˈeɪtɪɪθ /

adjective

1. usually prenominal
   1. being the ordinal number of eighty in numbering or counting order, position, time, etc: often written 80th
   2. ( as noun )

      the eightieth in succession

noun

1. 1. one of 80 approximately equal parts of something
   2. ( as modifier )

      an eightieth part

2. the fraction equal to one divided by 80 ( 1 80 )

Word History and Origins

Origin of eightieth¹

1350–1400; Middle English eightetithe, Old English ( hund ) eahtatigotha eightieth. See eighty, -th ²

Example Sentences

He lived to be ninety years old, and produced the most beautiful of his tragedies in his eightieth year, the "Oedipus at Colonus."

From Project Gutenberg

Mlle. Clairon died on January 31, 1803, six days after completing her eightieth year.

From Project Gutenberg

So active did he continue to the end of his days, that on his eightieth birthday he climbed an oak in my company.

From Project Gutenberg

Since that date he has lived retired in Hutchinson, where he still makes his home, being now in the eightieth year of his age.

From Project Gutenberg

None of us are, you know, when we pass the eightieth milestone!

From Project Gutenberg