The Collaborative International Dictionary of English v.0.48:

Garnet \Gar"net\, n. [OE. gernet, grenat, OF. grenet,grenat, F.
   grenat, LL. granatus, fr. L. granatum pomegranate, granatus
   having many grains or seeds, fr. granum grain, seed. So
   called from its resemblance in color and shape to the grains
   or seeds of the pomegranate. See Grain, and cf. Grenade,
   Pomegranate.] (Min.)
   A mineral having many varieties differing in color and in
   their constituents, but with the same crystallization
   (isometric), and conforming to the same general chemical
   formula. The commonest color is red, the luster is vitreous,
   and the hardness greater than that of quartz. The
   dodecahedron and trapezohedron are the common forms.
   [1913 Webster]

   Note: There are also white, green, yellow, brown, and black
         varieties. The garnet is a silicate, the bases being
         aluminia lime (grossularite, essonite, or cinnamon
         stone), or aluminia magnesia (pyrope), or aluminia iron
         (almandine), or aluminia manganese (spessartite), or
         iron lime (common garnet, melanite, allochroite), or
         chromium lime (ouvarovite, color emerald green). The
         transparent red varieties are used as gems. The garnet
         was, in part, the carbuncle of the ancients. Garnet is
         a very common mineral in gneiss and mica slate.
         [1913 Webster]

   Garnet berry (Bot.), the red currant; -- so called from its
      transparent red color.

   Garnet brown (Chem.), an artificial dyestuff, produced as
      an explosive brown crystalline substance with a green or
      golden luster. It consists of the potassium salt of a
      complex cyanogen derivative of picric acid.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Garnet \Gar"net\, n. [Etymol. unknown.] (Naut.)
   A tackle for hoisting cargo in or out.
   [1913 Webster]

   Clew garnet. See under Clew.
      [1913 Webster]

WordNet (r) 3.0 (2006):

garnet
    n 1: any of a group of hard glassy minerals (silicates of
         various metals) used as gemstones and as an abrasive

The Free On-line Dictionary of Computing (30 December 2018):

Garnet

   1. A graphical object editor and Macintosh environment.

   2. A user interface development environment for Common Lisp
   and X11 from The Garnet project team.  It helps you create
   graphical, interactive user interfaces.

   Version 2.2 includes the following: a custom object-oriented
   programming system which uses a prototype-instance model.
   automatic constraint maintenance allowing properties of
   objects to depend on properties of other objects and be
   automatically re-evaluated when the other objects change.  The
   constraints can be arbitrary Lisp expressions.  Built-in,
   high-level input event handling.  Support for gesture
   recognition.  Widgets for multi-font, multi-line,
   mouse-driven text editing.  Optional automatic layout of
   application data into lists, tables, trees or graphs.
   Automatic generation of PostScript for printing.  Support
   for large-scale applications and data visualisation.

   Also supplied are: two complete widget sets, one with a
   Motif look and feel implemented in Lisp and one with a
   custom look and feel.  Interactive design tools for creating
   parts of the interface without writing code: Gilt interface
   builder for creating dialog boxes.  Lapidary interactive
   tool for creating new widgets and for drawing
   application-specific objects.  C32 spreadsheet system for
   specifying complex constraints.

   Not yet available: Jade automatic dialog box creation system.
   Marquise interactive tool for specifying behaviours.

   (ftp://a.gp.cs.cmu.edu/usr/garnet/garnet).

   (1999-07-02)