1.NounA political, cultural or social entity or part thereof that is completely surrounded by another.
"The Republic of San Marino is an enclave of Italy.; The streets around Union Square form a Protestant enclave within an otherwise Catholic neighbourhood."
2.NounA group that is set off from a larger population by its characteristic or behavior.
3.NounAn isolated portion of an application's address space, such that data in an enclave can only be accessed by code in the same enclave.