The Collaborative International Dictionary of English v.0.48:

Composite \Com*pos"ite\ (?; 277), a. [L. compositus made up of
   parts, p. p. of componere. See Compound, v. t., and cf.
   Compost.]
   1. Made up of distinct parts or elements; compounded; as, a
      composite language.
      [1913 Webster]

            Happiness, like air and water . . . is composite.
                                                  --Landor.
      [1913 Webster]

   2. (Arch.) Belonging to a certain order which is composed of
      the Ionic order grafted upon the Corinthian. It is called
      also the Roman or the Italic order, and is one of the
      five orders recognized by the Italian writers of the
      sixteenth century. See Capital.
      [1913 Webster]

   3. (Bot.) Belonging to the order Composit[ae]; bearing
      involucrate heads of many small florets, as the daisy,
      thistle, and dandelion.
      [1913 Webster]

   Composite carriage, a railroad car having compartments of
      different classes. [Eng.]

   Composite number (Math.), one which can be divided exactly
      by a number exceeding unity, as 6 by 2 or 3..

   Composite photograph or Composite portrait, one made by a
      combination, or blending, of several distinct photographs.
      --F. Galton.

   Composite sailing (Naut.), a combination of parallel and
      great circle sailing.

   Composite ship, one with a wooden casing and iron frame.
      [1913 Webster]

WordNet (r) 3.0 (2006):

composite number
    n 1: an integer that is divisible without remainder by at least
         one positive integer other than itself and one