also: うすい
noun
rainwater; rain water
Refers to water that falls as rain, often in contrast to tap water or other water sources. Common in everyday contexts.
雨水をためて庭の水やりに使っている。
I collect rainwater and use it to water the garden.
雨水が樋を伝って流れ落ちる。
Rainwater runs down the gutter.
noun
"rain water" solar term (approx. Feb 19)
Only with reading うすい
The second solar term in the traditional East Asian calendar, marking the transition from snow to rain. Read うすい in this context.
See also: 二十四節気
雨水のころには、雪が雨に変わり始める。
Around the time of the 'rain water' solar term, snow begins to turn to rain.