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

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

Example Sentences

Shohei Ohtani sparked the offense with his ninth leadoff home run of the season — and 22nd overall — on a two-hit day.

From Los Angeles Times • Jul. 12, 2026

Reliever Alex Vesia threw a scoreless ninth inning for his fifth consecutive scoreless outing to cap a night the Dodgers probably would like to forget.

From Los Angeles Times • Jul. 11, 2026

Arizona’s bullpen then held the Dodgers to just two hits — both coming in the ninth inning off Drey Jameson.

From Los Angeles Times • Jul. 11, 2026

A ninth person, Alexander Iniguez Mercado, was arrested last week and charged with obstruction of justice.

From BBC • Jul. 10, 2026

Before noon on the ninth day, the sea anchor broke away, and the boat lurched heavily as seas hit her broadside.

From "Shipwreck at the Bottom of the World" by Jennifer Armstrong