conventicle UK /kənˈvɛntɪk(ə)l/US /kənˈvɛn(t)ək(ə)l/noun 3verb 1forms 3 noun3 •A secret, unauthorized or illegal religious meeting. •The place where such a meeting is held. •A Quaker meetinghouse. verb1 •To hold a secret, unauthorized or illegal religious meeting. formsconventicled · conventicling · conventicles