subimperialist adjective 1noun 1forms 3 adjective1 •Of or pertaining to subimperialism. noun1 •Somebody who is committed to a subimperialism.But by the 1930s, the imperial garrisons had multiplied and the institutional complexity of the armed services opened new possibilities for subimperialists. — 1998 formssubimperialists · more subimperialist · most subimperialist