ninth

[ nahynth ]
See synonyms for ninth on Thesaurus.com
adjective
  1. next after the eighth; being the ordinal number for nine.

  2. being one of nine equal parts.

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

  2. the ninth member of a series.

  1. Music.

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

    • the interval between such tones.

    • harmonic combination of such tones.

adverb
  1. in the ninth place.

Origin of ninth

1
before 900; Middle English ninthe (see nine, -th2), replacing Middle English niend (Old English nigend), neogethe, nigethe (Old English nigotha); akin to Old Saxon nigutho,Old Norse nīundi,Gothic niunda

Other words from ninth

  • ninthly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use ninth in a sentence

  • Its most important compound is water, of which it forms one-ninth, the other eight-ninths consisting of oxygen.

  • And next he filled up the intervals of a fourth with ninths, leaving a remnant which is in the ratio of 256:243.

    Timaeus | Plato
  • That each of the 90 must pay ten-ninths of a pound is a conclusion that the rule of three draws for us.

    Domesday Book and Beyond | Frederic William Maitland
  • The notes were thus reduced 50 per cent., and the shares only four-ninths per cent.

  • The wine in small glass was one-sixth of the total liquid, and the wine in large glass two-ninths of total.

    Amusements in Mathematics | Henry Ernest Dudeney

British Dictionary definitions for ninth

ninth

/ (naɪnθ) /


adjective
  1. (usually prenominal)

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

    • (as noun): he came on the ninth; ninth in line

noun
    • one of nine equal or nearly equal parts of an object, quantity, measurement, etc

    • (as modifier): a ninth part

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

  1. music

    • an interval of one octave plus a second

    • one of two notes constituting such an interval

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

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

Origin of ninth

1
Old English nigotha; related to Old High German niunto, Old Norse nīundi

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012