Source : Webster's Revised Unabridged Dictionary (1913)

Seventh \Sev"enth\, n.
   1. One next in order after the sixth; one coming after six
      others.

   2. The quotient of a unit divided by seven; one of seven
      equal parts into which anything is divided.

   3. (Mus.)
      (a) An interval embracing seven diatonic degrees of the
          scale.
      (b) A chord which includes the interval of a seventh
          whether major, minor, or diminished.

Seventh \Sev"enth\, a. [From {Seven}: cf. AS. seofo[eth]a.]
   1. Next in order after the sixth;; coming after six others.

            On the seventh day, God ended his work which he had
            made; and he rested on the seventh day from all his
            work which he had made.               --Gen. ii. 2.

   2. Constituting or being one of seven equal parts into which
      anything is divided; as, the seventh part.

   {Seventh day}, the seventh day of the week; Saturday.

   {Seventh-day Baptists}. See under {Baptist}.

Source : WordNet®

seventh
     adj : coming next after the sixth and just before the eighth in
           position [syn: {7th}]

seventh
     n 1: position seven in a countable series of things
     2: a seventh part [syn: {one-seventh}]
     3: the musical interval between one note and another seven
        notes away from it