ˈlife ˌbuoy BrE AmE noun [countable]
a large ring made out of material that floats, which you throw to someone who has fallen in the water, to prevent them from drowning
ˈlife ˌbuoy BrE AmE noun [countable]
a large ring made out of material that floats, which you throw to someone who has fallen in the water, to prevent them from drowning
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012