雪 (xuě) is a noun meaning "snow." It refers to the white precipitation that falls in cold weather. It is used in weather descriptions and compounds such as 大雪 (heavy snow), 雪山 (snow-capped mountain), and 暴风雪 (blizzard).
今天早上下了一场大雪,到处都是白色的。
Jīntiān zǎoshang xià le yì chǎng dà xuě, dàochù dōu shì báisè de.
There was a heavy snowfall this morning, and everything was white.
孩子们在雪里开心地打雪仗。
Háizimen zài xuě lǐ kāixīn de dǎ xuězhàng.
The children happily had a snowball fight in the snow.
山顶上的雪常年不化,非常壮观。
Shāndǐng shàng de xuě chángnián bù huà, fēicháng zhuàngguān.
The snow on the mountaintop never melts year-round, and it is very spectacular.