insurrectionist adjective 1noun 1forms 1 adjective1 •Involved in or characterized by insurrection.The atmosphere was undeniably insurrectionist in nature, yet the police response was languid to the extent that one woman asked an officer when they would be leaving because "they have to fix up." — 2016 noun1 •A person who provokes or takes part in an insurrection. formsinsurrectionists