'Exclave' definitions:

Definition of 'Exclave'

From: GCIDE

Exclave \Ex*clave"\, n. [Formed fr. enclave by substitution of ex- for en-] A portion of a country which is separated from the main part and surrounded by politically alien territory. [Recent.] [1913 Webster]
Note: The same territory is an enclave in respect to the surrounding country and an exclave with respect to the country to which it is politically attached. [1913 Webster]