tricolor

Short definition from Wiktionary

Adjective

1. 1
   Having three colours.

Noun

1. 1
   A flag consisting of three stripes that are either vertical or horizontal, all of equal size, and each of a different colour.
2. 2
   Anything which is composed of three colours.

Proper noun

1. 1
   the French flag
2. 2
   the Irish flag
3. 3
   the Italian flag