1. a person who hails or greets someone
2. a device or system used to hail or summon, especially in maritime contexts
Usage: nautical

Examples

• The hailer at the entrance welcomed guests as they arrived.
• A friendly hailer greeted us at the door of the restaurant.
• The ship's hailer system allowed the captain to communicate with nearby vessels.
• She was known as a cheerful hailer who never missed an opportunity to say hello.
• The hailer on the dock called out to the incoming fishing boats.