demarcate
verbNAmE//dɪˈmɑrkeɪt//, NAmE//ˈdimɑrˌkeɪt//
demarcate something (formal)Verb Forms present simple I / you / we / they demarcate he / she / it demarcates
past simple demarcated
-ing form demarcating
Check pronunciation: demarcate
Definition of demarcate verb from the Oxford Advanced American Dictionary