ˌlüēˈsān(ˌ)yō noun
( plural luiseño or luiseños )
Usage: usually capitalized
Etymology: American Spanish, from San Luis Rey de Francia, mission in California + Spanish -eño (suffix added to place names to form names of inhabitants)
1.
a. : a Shoshonean people of southwestern California
b. : a member of such people
2. : the language of the Luiseño people