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

But Muncy hit a bomb into the right upper-deck stands to make it 4-3 in the eighth followed by Rojas’ improbable solo shot in the ninth to send it to extra innings. —Greg Rosenstein, NBC news, 2 Nov. 2025

Tyler Glasnow, one of the Dodgers’ options for a Game 7, relieved Sasaki in the ninth to ensure the Dodgers got to live another day. —Fabian Ardaya, New York Times, 1 Nov. 2025

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

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