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secret intelligence service is a noun meaning "the government agency in the United Kingdom that is responsible for internal security and counterintelligence overseas". It carries one recorded sense.
the government agency in the United Kingdom that is responsible for internal security and counterintelligence overseas
United Kingdom
Definitions, synonyms and semantic relations for secret intelligence service come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.