Mood (noun)

1. A state of mind or feeling characterized by a particular emotion.
2. A particular feeling or emotion that is expressed through the tone, style, or atmosphere of something, such as a piece of music, a poem, or a work of art.
3. A grammatical category that indicates the manner in which a verb is used to indicate the attitude of the speaker toward the action being described.

Origin:

The word 'mood' originated from the middle english word 'mode' meaning 'manner or way'.

Examples:

1. She was in a bad mood and didn't want to talk to anyone.
2. The music had a sad and melancholic mood.
3. The mood of the meeting was tense and serious.
4. The movie had a lighthearted mood and made the audience feel happy.
5. The painting had a dark and eerie mood, which made it very suspenseful.