ˈdiatribist [f.prec. + -ist.] One who writes or utters a diatribe; † the writer of a critical dissertation. a1660Hammond Wks. II. iv. 134 (R.) The same I desire may introduce my address to this diatribist.1678Cudworth Intell.Syst. i. iv. 190 Against a modern Diatribist.