Source : Webster's Revised Unabridged Dictionary (1913)

Enclave \En*clave"\, n. [F., fr. L. in + clavus a nail.]
   A tract of land or a territory inclosed within another
   territory of which it is independent. See {Exclave}. [Recent]

Enclave \En*clave"\, v. t. [Cf. F. enclaver.]
   To inclose within an alien territory. [Recent]

Source : WordNet®

enclave
     n : an enclosed territory that is culturally distinct from the
         foreign territory that surrounds it