A kodachi is a sword that is longer than a dagger, but shorter than a long sword.
A kodachi is somewhat similar to the wakizashi.
by ♫ Highway to Hell ♫ July 18, 2011
A weapon with a blade longer than that of a dagger, but shorter than that of a sword. The kodachi is mainly used for defense.
Aoshi Shinomori kicks butt with his two kodachi.
by MT November 20, 2003