1.Definition: an emotion of great sadness associated with loss or bereavement

"He tried to express his sorrow at her loss"

Category: Feelings

2.Definition: sadness associated with some wrong done or some disappointment

"He drank to drown his sorrows", "He wrote a note expressing his regret", "To his rue, the error cost him the game"

Related Noun(s):regret, rue, ruefulness

Category: Feelings

3.Definition: something that causes great unhappiness

Related Noun(s):grief

Category: General

4.Definition: the state of being sad

Related Noun(s):sadness, sorrowfulness

Category: General