intertropical convergence zone Syllabification: (in·ter·trop·i·cal con·ver·gence zone)Pronunciation: /ˌintərˈträpikəl/Definition of intertropical convergence zone noun a narrow zone near the equator where northern and southern air masses converge, typically producing low atmospheric pressure. intertropical convergence zone in other Oxford dictionaries Definition of intertropical convergence zone in the British & World English dictionary