lifeguard

[ lahyf-gahrd ]
/ ˈlaɪfˌgɑrd /

noun

an expert swimmer employed, as at a beach or pool, to protect bathers from drowning or other accidents and dangers.

verb (used without object)

to work as a lifeguard.

Origin of lifeguard

First recorded in 1640–50; life + guard
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for lifeguard

lifeguard

/ (ˈlaɪfˌɡɑːd) /

noun

a person present at a beach or pool to guard people against the risk of drowningAlso called: life-saver
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