from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An expert swimmer trained and employed to watch over other swimmers, as at a beach or swimming pool. Also called lifesaver.
- intransitive v. To work or serve as a lifeguard.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A guard of the life or person; a guard that attends a prince or other person; a bodyguard.
- n. An attendant, usually an expert swimmer, employed to save swimmers in trouble or near drowning at a body of water.
- n. A lifesaver.
- n. 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.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an attendant employed at a beach or pool to protect swimmers from accidents
From life + guard. Compare German Leibgarde ("bodyguard"), Danish livgarde ("bodyguard"), Swedish livgarde ("bodyguard"). Compare also Old English līfweard ("guardian of life"). (Wiktionary)