si ‧ lenc ‧ er /ˈsaɪlənsə $ -sər/ BrE AmE noun [countable]
[ Word Family: noun : ↑ silence , ↑ silencer ; verb : ↑ silence ; adverb : ↑ silently ; adjective : ↑ silent ]
1 . British English a piece of equipment that is connected to the ↑ exhaust of a vehicle to make its engine quieter SYN muffler American English
2 . a thing that is put on the end of a gun so that it makes less noise when it is fired