† comˈpupilObs.rare. [f. com- + pupil.] A fellow-pupil. 1640Walton Life Donne (1670) 19 Dr. Donne and his sometime compupil in Cambridge.1665― Hooker i. 4 Dr. Spencer, a bosom friend, and sometime com-pupil with Mr. Hooker in Corpus Christi college in Oxford.