Definition of Exterritoriality
The privilege of those persons (such as foreign ministers) who, though temporarily resident within a country, are not subject to the operation of its laws. The exemption from the operation of the ordinary laws of the country accorded to foreign monarchs temporarily within the country and their retinue, to diplomatic agents and the members of their household, and to others of similar position and rank. See Capitulation; Extraterritoriality.
That's the definition of Exterritoriality in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.