Source : Webster's Revised Unabridged Dictionary (1913)

Tricolor \Tri"col`or\, n. [F. tricolore, drapeau tricolore a
   tricolored flag, fr. tricolore three-colored; tri (see
   {Tri-}) + L. color color.] [Written also {tricolour}.]
   1. The national French banner, of three colors, blue, white,
      and red, adopted at the first revolution.

   2. Hence, any three-colored flag.

Source : WordNet®

tricolor
     adj : having or involving three colors; "trichromatic vision"; "a
           trichromatic printing process"; "trichromatic staining
           is the staining of tissue samples differentially in
           three colors"; "tricolor plumage"; "a tricolor process
           in photography" [syn: {trichromatic}, {trichrome}]
     n : a flag having three colored stripes (especially the French
         flag) [syn: {tricolour}]