ridleyPronunciation: /ˈrɪdli/ (also ridley turtle)Definition of ridley noun (plural ridleys) a small turtle of tropical seas. Genus Lepidochelys, family Cheloniidae: Kemp’s ridley (L. kempi) of the Atlantic, and the larger olive ridley (L. olivacea) of the Pacific Origin: late 19th century: of unknown originridley in other Oxford dictionaries Definition of ridley in the US English dictionary