1. people who travel or spend time in boats
2. flat-topped straw hats with a ribbon band

Examples

• The lake was crowded with boaters enjoying the sunny weather.
• Many boaters gathered at the marina for the regatta.
• The gentlemen wore boaters and white suits to the garden party.
• Boaters were popular summer hats in the early 1900s.
• Safety regulations require all boaters to carry life jackets.
• The vintage shop had a collection of old boaters on display.
• Weekend boaters filled the harbor with their sailboats and motorboats.