Definitions

1. adjective

having or showing a tendency to become or remain in a state of depression or low spirits.

“She was a moody teenager, often sulking in her room.”

2. noun

a person who is often in a depressed or irritable mood.

“He’s such a moody person, never happy about anything.”

3. adverb

in a moody way, especially in a depressed or irritable mood.

“He was moody all day, not wanting to talk to anyone.”