militarian UK /ˌmɪl.ɪˈtɛəɹi.ən/US /ˌmɪl.ɪˈtɛɹi.ən/adjective 1noun 1forms 3 adjective1 •of or pertaining to the militaryNaturally our talk at first was about the Scouts Movement which he [Baden-Powell] was anxious to disassociate from everything militarian. — 1923 noun1 •A person in or involved with military service.For militarians, he gives the lowdown on cruise missiles and submarines. For utilitarians, there are explanations of how refrigerators and air-conditioners work — 2001 formsmilitarians · more militarian · most militarian