Definition: Unhappiness, sadness, sorrow. Detailed meaning varies greatly. Notable examples include: - Unhappiness - feeling upset or discontent. - Sadness - feeling sad, depressed, or distressed. - Sorrow - feeling deep regret or remorse. - Joylessness - not having much enthusiasm for something or others. Many people can express various levels of unhappiness using these words. The word 'unhappy' is also used in the context of sorrow and sadness.