NOUN (1)

1. a male singing voice with artificially high tones in an upper register;


ADJECTIVE (1)

1. artificially high; above the normal voice range;
- Example: "a falsetto voice"

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

The Collaborative International Dictionary of English v.0.48:

Falsetto \Fal*set"to\, n.; pl. Falsettos. [It. falsetto, dim.
   fr. L. falsus. See False.]
   A false or artificial voice; that voice in a man which lies
   above his natural voice; the male counter tenor or alto
   voice. See Head voice, under Voice.
   [1913 Webster]

WordNet (r) 3.0 (2006):

falsetto
    adj 1: artificially high; above the normal voice range; "a
           falsetto voice"
    n 1: a male singing voice with artificially high tones in an
         upper register