a species of cicada (Meimuna opalifera) found in East Asia, typically appearing in late autumn; also known as 寒蜩 hán​tiáo or 寒螀 hán​jiāng

a person who keeps their thoughts to themselves or remains silent out of fear, especially in the phrase 噤若寒蝉 jìn​ruò​hán​chán

a cicada that falls silent or makes little noise as the weather turns cold