Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
exterritorial is an adjective meaning "outside territorial limits or jurisdiction". It carries one recorded sense.
outside territorial limits or jurisdiction
“fishing in extraterritorial waters”
“enjoying exterritorial privileges and rights”
Definitions, synonyms and semantic relations for exterritorial come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.