1. The government agency in the United Kingdom that is responsible for internal security and counterintelligence on British territory
   - Security Service [Brit], Military Intelligence Section 5 [Brit]

Type of: international intelligence agency

• Silver State
• silver storm
• silver thatch
• silver tree
• silver tree fern
• silver wattle
• silver wedding
• silver wedding anniversary
• silver whiting
• silver willow
• silver-blue
• silver-bodied
• silver-colored
• silver-coloured
• silver-gray
• silver-green
• silver-haired
• silver-lace
• silver-leafed
• silver-leaved
• silver-leaved nettle
• silver-leaved nightshade
• silver-leaved poplar
• silver-scaled
• silver-tongued