1. Word forms: plural ˈSenecas or ˈSeneca a member of a North American Indian people formerly living in W New York and now living chiefly in New York and Ontario. see also Five Nations
2. the Iroquoian language of this people
3. of the Senecas or their language or culture
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'Seneca'< Du Sennecas, prob. < Mahican: orig. ref. to the Oneida, later including also the Onondaga, Cayuga,