life buoy


noun

any of variously formed buoyant devices for supporting a person fallen into the water.
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British Dictionary definitions for life buoy

life buoy

noun

any of various kinds of buoyant device for keeping people afloat in an emergency
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012