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

Mitchell was replaced by rookie outfielder Luis Lara, who had an RBI triple in the eighth. — ABC News, 23 Aug. 2026

Grisham went 3-for-5 in the victory, crushing a solo home run in the fifth inning, lining a go-ahead RBI double in the seventh, and adding a two-run blast in the eighth. — Gary Phillips, New York Daily News, 13 Aug. 2026

The fruit should fill only about one-eighth of the container, leaving roughly 2 inches of empty space between the bait and the paper funnel. — Emma Jacobson, Bon Appetit Magazine, 13 Aug. 2026

The Dodgers tied it 4-4 on Mookie Betts' RBI single off reliever Steven Cruz in the eighth. — CBS News, 12 Aug. 2026

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