ninth

American  

[nahynth] / naɪnθ /

adjective

1. next after the eighth; being the ordinal number for nine.

2. being one of nine equal parts.

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noun

• ninths
  plural

1. a ninth part, especially of one (1/9).

2. the ninth member of a series.

3. Music.

   1. a tone distant from another tone by an interval of an octave and a second.

   2. the interval between such tones.

   3. harmonic combination of such tones.

adverb

1. in the ninth place.

ninth British  

/ naɪnθ /

adjective

1. (usually prenominal)

   1. coming after the eighth in counting order, position, time, etc; being the ordinal number of nine. Often written: 9th

   2. ( as noun )

      he came on the ninth

      ninth in line

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noun

1. 1. one of nine equal or nearly equal parts of an object, quantity, measurement, etc

   2. ( as modifier )

      a ninth part

2. the fraction equal to one divided by nine ( 1/ 9 )

3. music

   1. an interval of one octave plus a second

   2. one of two notes constituting such an interval

   3. See ninth chord

adverb

1. Also: ninthly. after the eighth person, position, event, etc

1. Also: ninthly. as the ninth point: linking what follows to the previous statement

Other Word Forms

Derived Forms

• ninthly
  adverb

Inflected Forms

Nouns

• ninths
  plural

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Etymology

Origin of ninth

before 900; Middle English ninthe ( see nine, -th ²), replacing Middle English niend ( Old English nigend ), neogethe, nigethe ( Old English nigotha ); akin to Old Saxon nigutho, Old Norse nīundi, Gothic niunda

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Example Sentences

See Examples For:

ninth ninths

In his recently released ninth book, “The American Way of Killing,” Gladwell does what he does well.

From Los Angeles Times ● Oct. 27, 2026

The 20-year-old Italian, who leads team-mate George Russell by 123 points in the standings, will secure the title in Mexico City on Sunday by finishing ninth or higher.

From BBC ● Oct. 27, 2026

“If you’re in ninth grade and you’re talking to them about retirement, they’re like, ‘OK, that’s 100 years from now,’” Bean noted.

From MarketWatch ● Oct. 26, 2026

Clint Henderson, managing editor for the rewards-card review site the Points Guy, earlier this year wanted to open a 28th credit card, and his ninth with Chase.

From The Wall Street Journal ● Oct. 25, 2026

The judge finally told us that we were fishing after we'd made our ninth or tenth request for more police and prosecution files.

From "Just Mercy" by Bryan Stevenson

Jagged with octave jumps, hard-to-land-on intervals of sevenths and ninths, and grinding dissonances, his high-tensioned 70-minute song cycle was even more difficult to sing than to listen to.

From Time Magazine Archive

Other than wins, Sofia has had a third, two fifths and two ninths.

From Time Magazine Archive

Sofia has had three first place wins, a third, two fifths and two ninths.

From Time Magazine Archive

They only babbled of theme and counter-theme, of harmonies and resultant sounds, of consecutive ninths and tierce major.

From Jean Christophe: in Paris The Market-Place, Antoinette, the House by Gilbert Cannan

So, Fifths, sixths, sevenths, eighths, ninths, tenths, &c.

From The Grammar of English Grammars by Goold Brown

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