exclave Syllabification: (ex·clave)Pronunciation: /ˈekˌsklāv/Definition of exclave noun a portion of territory of one state completely surrounded by territory of another or others, as viewed by the home territory. Compare with enclave.Origin: late 19th century: from ex-1 'out' + a shortened form of enclaveexclave in other Oxford dictionaries Definition of exclave in the British & World English dictionary