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

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

• ninthly adverb

Etymology

Origin of ninth

before 900; Middle English ninthe ( 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

They drafted him ninth overall in 2024, luring him away from LSU with a bonus of $6.5 million.

From The Wall Street Journal • Apr. 9, 2026

The sight of Player holing birdie putts and celebrating by lifting one young fan into his arms, contrasted superbly with nine-year-old Frankie Fleetwood's focus and determination to clear the water and hit the ninth green.

From BBC • Apr. 8, 2026

Goldman Sachs is raising $13 billion for its ninth GS Mezzanine Partners fund.

From Barron's • Apr. 8, 2026

It isn’t unheard of for a player to get seventh, eighth and ninth years of eligibility.

From Salon • Apr. 5, 2026

My sixteenth birthday was on the ninth of February, 1945, a day I shall never forget, and not because I had lots of presents, or lots of friends to the house for a party.

From "An Elephant in the Garden" by Michael Morpurgo