Lifeguard (Automobile safety)
WordNet
noun
(1) An attendant employed at a beach or pool to protect swimmers from accidents
WiktionaryText
English
Noun
- an attendant, usually an expert swimmer, employed to save swimmers in trouble or near drowning at a body of water
- a lifesaver
- a sturdy metal bracket affixed in front of each of the leading wheels of a train to deflect small objects away from the wheels to prevent derailment.