상식이나 진지한 생각이 부족함, 또는 어리석거나 가벼운 행동.
A lack of common sense or serious thought; behavior that is foolish or lighthearted.
예문:
"The movie's charm lies in its pure silliness and lack of serious themes."
"He apologized for his silliness during the meeting, admitting he hadn't thought things through."
"The children's laughter filled the room as they engaged in playful silliness."