Graysonian UK /ɡɹeɪˈsəʊ.ni.ən/US /ɡɹeɪˈsoʊ.ni.ən/ adjective1 •Of or relating to Ray Stannard Baker (1870–1946), also known by his pen name David Grayson, an American journalist and author. formsmore Graysonian · most Graysonian