Sinner/ˈsɪnər/ Definition 1 of 3Pro Tip 1/3Religious Context Often used in religious discussions about morality and ethics. The sermon today made me reflect on the life of a sinner. Pro Tip 2/3Repentance Associated 'Sinner' is commonly paired with repentance and redemption in religious texts. Every sinner has a future, just as every saint has a past. Pro Tip 3/3Cultural Sensitivity Can be considered offensive if used to judge others' actions or beliefs. You shouldn't call someone a sinner for having different customs.