beatitudinous,a.rare.|biːˌætɪˈtjuːdɪnəs| [f. L. beātitūdin- stem of beātitūdo blessedness + -ous.] Characteristic of blessedness or happiness. 1926D. H. Lawrence Plumed Serpent xiv. 229 Her childish..slightly imbecile face would take on a black, arch, beatitudinous look.