Rousseauian UK /ɹuːˈsəʊɪən/US /ɹuˈsoʊɪən/adjective 1noun 1forms 3 adjective1 •Of or relating to the philosopher Jean-Jacques Rousseau (1712–1778). noun1 •A follower of Rousseau or his philosophies. formsRousseauians · more Rousseauian · most Rousseauian