Boon RJ Hamster 2 years ago WORD OF THE DAY Boon [ boon ] noun a thing that is helpful or beneficial. Examples of boon in a sentence: Because Gerald has such a hectic schedule, he considers the flexibility of online classes to be a huge boon. The decreasing fuel prices are a much-needed boon for drivers. No longer want to receive these emails? Unsubscribe. Word Guru 695 Town Center Dr Suite 1200 Costa Mesa, CA 92626 Share this:Print