pl.Iroquois a member of a confederation of Iroquoian Indian peoples that lived in upstate New York and included the Senecas, Cayugas, Onondagas, Oneidas, Mohawks, and (after 1723) the Tuscaroras: their descendants live in New York, Ontario, Quebec, and Oklahoma
a. A Native American confederacy inhabiting New York State and originally composed of the Mohawk, Oneida, Onondaga, Cayuga, and Seneca peoples, known as the Five Nations. After 1722 the confederacy was joined by the Tuscaroras to form the Six Nations. Also called Iroquois League.
b. A member of this confederacy or of any of its peoples.