Webster's Revised Unabridged Dictionary · 1913

Tricolor

Tricolor , noun

[French tricolore, drapeau tricolore a tricolored flag, from tricolore three-colored; tri (see Tri-) + Latin color color.]

1.
The national French banner, of three colors, blue, white, and red, adopted at the first revolution.
2.
Hence, any three-colored flag.