Dictionary.net

• a league of Iroquois tribes including originally the Mohawk, Oneida, Onondaga, Cayuga and Seneca (the Five Nations); after 1722 they were joined by the Tuscarora (the Six Nations)

2006 - WordNet 3.0
By Princeton University

• See Iroquois.

1894 - Dictionary of United States history
By John Franklin Jameson