Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
☆ an expert swimmer employed as at a beach or pool to prevent drownings
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
An expert swimmer trained and employed to watch over other swimmers, as at a beach or swimming pool. Also called lifesaver.intransitive verb life·guard·ed, life·guard·ing, life·guards
To work or serve as a lifeguard.