Definitions of sorrow:

• noun:   an emotion of great sadness associated with loss or bereavement

  Example: "He tried to express his sorrow at her loss"

• noun:   sadness associated with some wrong done or some disappointment

  Example: "He drank to drown his sorrows"

• noun:   something that causes great unhappiness
• noun:   the state of being sad
• verb:   feel grief; eat one's heart out
• name:  A surname (very rare: popularity rank in the U.S.: #42021)