Ninth definition

nīnth
The ordinal number matching the number nine in a series.
noun
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The ordinal form of the number nine.
adjective
1
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The person or thing in the ninth position.
noun
1
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One of nine equal parts of a whole.
noun
1
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Designating any of the nine equal parts of something.
adjective
1
1
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The one following the eighth.
noun
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A harmonic or melodic interval of an octave and a second.
noun
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The tone at the upper limit of such an interval.
noun
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A chord consisting of a root with its third, seventh, and ninth.
noun
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Any of the nine equal parts of something;19
noun
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An interval in pitch of an octave and a second.
noun
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A tone separated from another by such an interval.
noun
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The combination of two such tones.
noun
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In the ninth place, rank, group, etc.
adverb
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One of nine equal parts.
noun
0
1
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Preceded by eight others in a series; 9th.
adjective
0
1

Other Word Forms

Noun

Singular:
ninth
Plural:
ninths

Origin of ninth

  • Middle English ninthe from Old English nigonthe from nigon nine newn̥ in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Middle English ninthe, from Old English nigoþa (nigonthe), from nigon (“nine")

    From Wiktionary