Sullen
Definition 1 of 2
Pro Tip 1/3
Mood Indicator
Use 'sullen' to describe someone showing irritation or ill humor by a gloomy silence. After losing the game, he had a sullen demeanor.
Pro Tip 2/3
Not Rude
'Sullen' suggests a silent moodiness, not rudeness or meanness. Her sullen attitude was more about her sadness than any dislike for us.
Pro Tip 3/3
Temporary State
'Sullen' often implies a temporary state rather than a permanent trait. He's usually cheerful, just a bit sullen today.