ninth

noun

ˈnīn(t)th 

plural ninths ˈnīn(t)s 

ˈnīn(t)ths

1

: one that is number nine in a series

They're leaving on the ninth.

The batter hit a home run in the bottom of the ninth.

see Table of Numbers

2

: one of nine equal parts of something

She owned a ninth of the company.

3

a

: a musical interval embracing an octave and a second

b

: the tone at this interval

c

: a chord containing a ninth

ninth adjective or adverb

the ninth day of the month

the book's ninth edition

He finished ninth in the race.

Examples of ninth in a Sentence

Recent Examples on the Web

Anthony Banda took care of the eighth, and Roki Sasaki regained his mojo, after a shaky outing in Game 1 in Milwaukee, with a 1-2-3 ninth. —Jim Alexander, Oc Register, 17 Oct. 2025

The Marlins’ George Soriano fanned one in a perfect ninth to earn his first save of the season. —Miami Herald, 21 Sep. 2025

Weber runs Black Spur Labradors, a small breeding operation in Prior Lake, where Kanner recently watched the birth of eight pups with a surprise ninth coming later. —Mary Ann Grossmann, Twin Cities, 21 Sep. 2025

The Giants took advantage of the blunder, scoring three runs in the ninth to steal a win in Chavez Ravine. —Justice Delos Santos, Mercury News, 20 Sep. 2025

Word History

First Known Use

13th century, in the meaning defined at sense 2

Phrases Containing ninth

• ninth cranial nerve

Kids Definition

ninth

noun

ˈnīn(t)th 

plural ninths

: one that is number nine in a series see number

ninth adjective or adverb