fourth /ˈforθ, ˈfɔrθ/
 第四


 fourth
 第四


 Fourth a.
 1. Next in order after the third; the ordinal of four.
 2. Forming one of four equal parts into which anything may be divided.


 Fourth, n.
 1. One of four equal parts into which one whole may be divided; the quotient of a unit divided by four.
 2. Mus. The interval of two tones and a semitone, embracing four diatonic degrees of the scale; the subdominant of any key.
 3. One coming next in order after the third.
 The Fourth, specifically, in the United States, the fourth day of July, the anniversary of the declaration of American independence; as, to celebrate the Fourth.

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 fourth
      adj : coming next after the third and just before the fifth in
            position or time or degree or magnitude; "the
            quaternary period of geologic time extends from the end
            of the tertiary period to the present" [syn: 4th, quaternary]
      n 1: following the third position; number four in a countable
           series
      2: one of four equal parts; "a quarter of a pound" [syn: one-fourth,
          quarter, fourth part, twenty-five percent, quartern]
      3: the musical interval between one note and another four notes
         away from it
      adv : in the fourth place; "fourthly, you must pay the rent on the
            first of the month" [syn: fourthly]