geocentrist adjective 1noun 1forms 3 adjective1 •Of or pertaining to geocentrism, the false belief the Sun revolves around the Earth.What about geocentrist Christians? — 2000 noun1 •A supporter of geocentrism, the false belief that the Sun revolves around the Earth.The intense hostility expressed by the scientific creationists toward the flat-earthers does not extend to the geocentrists, who hover on the edge of respectability among scientific creationists. — 1981 formsgeocentrists · more geocentrist · most geocentrist