Seminole, a North American Indian tribe of Creek origin who speaks a Muskogean language. In the last half of the 18th century, migrants from the Creek towns of southern Georgia moved into northern Florida, the former territory of the Apalachee and Timucua. By about 1775 those migrants had begun to be known under the name Seminole, probably derived from the Creek word simanó-li, meaning “separatist,” or “runaway.” The name may also have derived from the Spanish cimarrón