阴 [陰] yīn overcast (weather)cloudyshadyYin (the negative principle of Yin and Yang)negative (electric.)femininemoonimplicithiddengenitaliasurname Yin Example sentences 这个星期每天都是阴天。 zhège xīngqī měitiān dōu shì yīn tiān. This week is cloudy every day 明天不会下雨，是阴天。 míngtiān bù huì xià yǔ, shì yīn tiān. It won't rain tomorrow, it will be a cloudy day