Definitions:

1. characterized by or causing or expressing sadness adjective
   • growing more melancholy every hour
2. grave or even gloomy in character adjective
   • Despite her outgoing personality, she often felt a deep melancholy that was difficult to shake off.

Synonyms:

• Dejection
• Depression
• Despondence
• Dismalness
• Down in the dumps
• Feeling down
• Gloominess
• Glumness
• Grief
• Heavy-heartedness
• Lowness of spirits
• melancholic
• Misery
• Sadness
• somber
• Sorrow
• The blues
• Unhappiness