Simple Definition:

Melancholy is a feeling of sadness and sorrow. It is a state of being sad for a long period of time, often with no apparent reason. It is a deep and prolonged sadness that may result in a lack of interest or enjoyment in activities.

Examples:

• After the loss of her pet, she experienced a sense of melancholy that lasted for weeks.
• He retreated into a melancholic state after his relationship ended, becoming withdrawn and uninterested in socializing.

Very Simple Definition:

Melancholy is a strong feeling of sadness that lasts for a long time.

Examples:

• Sarah felt a deep sadness in her heart after her best friend moved away.
• The rainy weather made Tim feel sad and gloomy all day.