Sermon/ˈsɜːrmən/ Definition 1 of 2Pro Tip 1/3Religious Context Sermons are mostly heard in churches, temples, or during religious services. They went early to church to hear the Christmas sermon. Pro Tip 2/3Moral Lessons Sermons often encourage good behavior and moral values. The sermon today was about the importance of forgiveness. Pro Tip 3/3Not Just Preaching A sermon can include stories or examples to make the message clearer. The sermon included a touching story about helping others.