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

Miller struck out two in a perfect ninth for his eighth save. —Los Angeles Times, 20 Apr. 2026

Cincinnati’s bullpen tossed 4 1/3 innings of scoreless relief with Kyle Nicolas (1-0) striking out the side in the eighth before Tony Santillan struck out two in a clean ninth for his first save. —ABC News, 18 Apr. 2026

Jhoan Duran pitched a perfect ninth for his fifth save. —CBS News, 11 Apr. 2026

Braves closer Raisel Iglesias (S, 1) pitched a perfect ninth to preserve the victory. —Chad Bishop, AJC.com, 4 Apr. 2026

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