eighth

noun

ˈātth 

ˈāth

plural eighths ˈāt(th)s 

ˈāths

1

: one that is number eight in a series

the eighth of the month

see Table of Numbers

2

: one of eight equal parts of something

one eighth of a pie

an eighth of a pound

3

: eighth note

4

: octave

He contrasted himself with Elton John, who complained that his chubby hands could only reach an eighth, which was a hindrance to his piano technique (though clearly he overcame the problem).

—Susan Wyndham

eighth adjective or adverb

the eighth person in line

the country's eighth largest city

Examples of eighth in a Sentence

one eighth of the pie

An eighth of a pound is two ounces.

Recent Examples on the Web

After José Fermin worked a perfect eighth, the Angels took the lead for good in the bottom of the inning. —Jeff Fletcher, Oc Register, 10 July 2025

Adrián Morejón glided through a perfect seventh, and Jason Adam completed a perfect eighth. —Kevin Acee, San Diego Union-Tribune, 28 June 2025

Whitlock returned for a clean eighth and Aroldis Chapman kept the Blue Jays off the board in the ninth, but Toronto got to Justin Slaten in the 10th, loading the bases before Kirk hit a walk-off single. —Jen McCaffrey, New York Times, 1 May 2025

The four-run eighth was a fitting bookend to a game that started with both teams putting crooked numbers on the board. —Jeff Fletcher, Oc Register, 23 June 2025

Word History

First Known Use

1557, in the meaning defined at sense 2

Phrases Containing eighth

• eighth note
• eighth rest

Kids Definition

eighth

noun

ˈātth 

plural eighths ˈāt(th)s 

: one that is number eight in a series see number

eighth adjective or adverb