雷
Pinyin: léi
thunder
Example sentence
外面又打雷又下雨。
Wàimiàn yòu dǎ léi yòu xià yǔ.
It's thundering and raining outside.
What 雷 means
雷 (léi) is a Chinese word meaning “thunder”. It belongs to the Time & Nature topic and appears at HSK 4, so it is one of the words worth learning early when you study Chinese.