Definitions of Seneca:

• noun:   the Iroquoian language spoken by the Seneca people
• noun:   a member of the Iroquoian people formerly living in New York state south of Lake Ontario
• noun:   Roman statesman and philosopher who was an advisor to Nero; his nine extant tragedies are modeled on Greek tragedies (circa 4 BC - 65 AD)
• name:  A surname (very rare: popularity rank in the U.S.: #23398)