Definition: A pole that extends horizontally from the center of the boat to out and over the side of the boat. It is used as a training device for beginner water-skiers or
barefooters who are not ready to go long line behind the boat. Its purpose is to keep the skier close to the boat for easy coaching, as well as give the skier something steady and high to hold on to.
Pronunciation: büm • (noun)
Examples:
A boom is a great way to introduce beginners to barefoot waterskiing because they don't have to first learn how to do a deepwater start or a start with a board behind the boat.