NOUN (2)

1. plutonic igneous rock having visibly crystalline texture; generally composed of feldspar and mica and quartz;

2. something having the quality of granite (unyielding firmness);
- Example: "a man of granite"

The Collaborative International Dictionary of English v.0.48:

Granite \Gran"ite\ (gr[a^]n"[i^]t), n. [It. granito granite,
   adj., grainy, p. p. of granire to make grainy, fr. L. granum
   grain; cf. F. granit. See Grain.] (Geol.)
   A crystalline, granular rock, consisting of quartz, feldspar,
   and mica, and usually of a whitish, grayish, or flesh-red
   color. It differs from gneiss in not having the mica in
   planes, and therefore in being destitute of a schistose
   structure.
   [1913 Webster]

   Note: Varieties containing hornblende are common. See also
         the Note under Mica.
         [1913 Webster]

   Gneissoid granite, granite in which the mica has traces of
      a regular arrangement.

   Graphic granite, granite consisting of quartz and feldspar
      without mica, and having the quartz crystals so arranged
      in the transverse section like oriental characters.

   Porphyritic granite, granite containing feldspar in
      distinct crystals.

   Hornblende granite, or

   Syenitic granite, granite containing hornblende as well as
      mica, or, according to some authorities hornblende
      replacing the mica.

   Granite ware.
   (a) A kind of stoneware.
   (b) A Kind of ironware, coated with an enamel resembling
       granite.
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Syenite \Sy"e*nite\, n. [L. Syenites (sc. lapis), from Syene,
   Gr. ?.] (Min.)
   (a) Orig., a rock composed of quartz, hornblende, and
       feldspar, anciently quarried at Syene, in Upper Egypt,
       and now called granite.
   (b) A granular, crystalline, ingeous rock composed of
       orthoclase and hornblende, the latter often replaced or
       accompanied by pyroxene or mica. Syenite sometimes
       contains nephelite (elaeolite) or leucite, and is then
       called nephelite (elaeolite) syenite or leucite
       syenite.
       [1913 Webster]

WordNet (r) 3.0 (2006):

granite
    n 1: plutonic igneous rock having visibly crystalline texture;
         generally composed of feldspar and mica and quartz
    2: something having the quality of granite (unyielding
       firmness); "a man of granite"