1. (noun) sound-pitching instrument - swung around the head like a pūrerehua. Made by bending a thin piece of kareao (supplejack stem) in the form of a bow and fastening to its two ends as a bowstring a strip of the base of a raupō leaf. A short cord is attached to one end of the bow and when the tīrango is swung through the air it produces the sound from the vibration of the thin edge of the raupō leaf. The sound is similar to that of the rango (blowfly), hence the name.