Morrisonian UK /ˌmɒɹɪˈsəʊ.ni.ən/US /ˌmɔɹɪˈsoʊ.ni.ən/ adjective2 •Of or relating to British Labour politician Herbert Morrison (1888–1965), known for a model of establishing public corporations. •Of or relating to American educator Henry C. Morrison (1871–1945), known for a unit-based method of teaching. formsmore Morrisonian · most Morrisonian