Fourth (noun) Definition, Meaning & Examples

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adjective
  1. next after the third; being the ordinal number for four.
  2. being one of four equal parts.
  3. of, relating to, or operating at the gear transmission ratio at which the drive shaft speed is greater than that of third gear for a given engine crankshaft speed, but not so great as that of fifth gear, if such exists: fourth gear.
noun
  1. a fourth part, especially of one (¼).
  2. the fourth member of a series.
  3. Music.
    • a tone on the fourth degree from a given tone (counted as the first).
    • the interval between such tones.
    • the harmonic combination of such tones.
  4. fourth gear: She downshifted from fifth to fourth as we started up the hill.
  5. Independence Day; the Fourth of July.
adverb
  1. in the fourth place; fourthly.
adjective (usually prenominal)
    • coming after the third in order, position, time, etc. Often written: 4th
    • (as noun)
  2. denoting the fourth forward ratio of a gearbox in motor vehicles
noun
  1. music
    • the interval between one note and another four notes away from it counting inclusively along the diatonic scale
    • one of two notes constituting such an interval in relation to the other
  2. the fourth forward ratio of a gearbox in a motor vehicle
  3. a less common word for quarter (def. 2)
adverb Also: fourthly
  1. after the third person, position, event, etc
sentence connector Also: fourthly
  1. as the fourth point: linking what follows with the previous statements, as in a speech or argument
Fourth (noun) Definition, Meaning & Examples

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