The Collaborative International Dictionary of English v.0.48:

Tenor \Ten"or\, n. [L., from tenere to hold; hence, properly, a
   holding on in a continued course: cf. F. teneur. See
   Tenable, and cf. Tenor a kind of voice.]
   1. A state of holding on in a continuous course; manner of
      continuity; constant mode; general tendency; course;
      career.
      [1913 Webster]

            Along the cool sequestered vale of life
            They kept the noiseless tenor of their away. --Gray.
      [1913 Webster]

   2. That course of thought which holds on through a discourse;
      the general drift or course of thought; purport; intent;
      meaning; understanding.
      [1913 Webster]

            When it [the bond] is paid according to the tenor.
                                                  --Shak.
      [1913 Webster]

            Does not the whole tenor of the divine law
            positively require humility and meekness to all men?
                                                  --Spart.
      [1913 Webster]

   3. Stamp; character; nature.
      [1913 Webster]

            This success would look like chance, if it were
            perpetual, and always of the same tenor. --Dryden.
      [1913 Webster]

   4. (Law) An exact copy of a writing, set forth in the words
      and figures of it. It differs from purport, which is only
      the substance or general import of the instrument.
      --Bouvier.
      [1913 Webster]

   5. [F. t['e]nor, L. tenor, properly, a holding; -- so called
      because the tenor was the voice which took and held the
      principal part, the plain song, air, or tune, to which the
      other voices supplied a harmony above and below: cf. It.
      tenore.] (Mus.)
      (a) The higher of the two kinds of voices usually
          belonging to adult males; hence, the part in the
          harmony adapted to this voice; the second of the four
          parts in the scale of sounds, reckoning from the base,
          and originally the air, to which the other parts were
          auxillary.
      (b) A person who sings the tenor, or the instrument that
          play it.
          [1913 Webster]

   Old Tenor, New Tenor, Middle Tenor, different
      descriptions of paper money, issued at different periods,
      by the American colonial governments in the last century.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

high-pitched \high-pitched\ adj.
   1. high in pitch or frequency; -- used of sounds and voices.
      Opposite of low. [Narrower terms: adenoidal, pinched,
      nasal; altissimo; alto; countertenor, alto;
      falsetto; peaky, spiky; piping; shrill, sharp;
      screaky, screechy, squeaking, squeaky, squealing;
      soprano, treble; sopranino; tenor]

   Syn: high.
        [WordNet 1.5]

   2. set at a sharp or high angle or slant; as, a high-pitched
      roof.

   Syn: steeply pitched, steep.
        [WordNet 1.5] high-power

WordNet (r) 3.0 (2006):

tenor
    adj 1: (of a musical instrument) intermediate between alto and
           baritone or bass; "a tenor sax"
    2: of or close in range to the highest natural adult male voice;
       "tenor voice"
    n 1: the adult male singing voice above baritone [syn: tenor,
         tenor voice]
    2: the pitch range of the highest male voice
    3: an adult male with a tenor voice
    4: a settled or prevailing or habitual course of a person's
       life; "nothing disturbed the even tenor of her ways"
    5: the general meaning or substance of an utterance; "although I
       disagreed with him I could follow the tenor of his argument"
       [syn: tenor, strain]