Definitions of Leakey. English paleontologist whose account of fossil discoveries in Tanzania changed theories of human evolution (1903-1972) synonyms: Louis Leakey, Louis Seymour Bazett Leakey. example of: anthropologist. a social scientist who specializes in anthropology. Who is Leakey? Leakey, (born August 7, 1903, Kabete, Kenya—died October 1, 1972, London, England),Read More →