1. The government agency in the United Kingdom that is responsible for internal security and counterintelligence overseas
   - Secret Intelligence Service [Brit], MI 6 [Brit]

Type of: international intelligence agency

• initiative
• initiator
• initiatory
• inject
• injectable
• injectant
• injection
• injector
• injudicious
• injudiciously
• injudiciousness
• Injun
• Odovakar
• odynophagia
• Odysseus
• odyssey
• Oecanthus
• Oecanthus fultoni
• OECD
• oecumenic
• oecumenical
• oecumenism
• OED
• oedema
• Oedipal