1. a person employed to watch swimmers and rescue them if they are in danger

1. to work as a lifeguard

Examples

• The lifeguard blew his whistle to warn the swimmers.
• She worked as a lifeguard at the community pool last summer.
• The beach has three lifeguards on duty during peak hours.
• He lifeguarded at the water park for two seasons.
• The lifeguard quickly dove in to rescue the struggling child.
• All lifeguards must be certified in CPR and first aid.
• The red flag means no swimming even with lifeguards present.