n1.the Great Sphinx a large, very ancient sphinx which is close to the Pyramids of El Giza in Egypt and is visited by many tourists
n2.in Greekmythology, a creature with the head of a woman and the body of a lion. She layoutsideThebes and killed people who could not answer her riddle (=very difficult question). Oedipus answered the riddle, and the Sphinx killed herself.