also: よ
Refers broadly to the dark part of the day, from evening into night. It can be used as a noun or adverbially to mean 'at night' or 'in the evening.'
At night, this road is dark.
夜、少し散歩した。
I took a short walk at night.
Only with reading よる
Casual elliptical use of よる for the evening meal, understood from context as 夜ご飯 or 夕食. This sense is restricted to the reading よる.
今日の夜はカレーにしよう。
Let's have curry for dinner tonight.
We kept talking with friends until dawn broke.
What are we having tonight (for dinner)?
In summer it's still hot even after night falls.
We spent the night at a mountain hut.
I was working until late at night.
night work (in entertainment or sex industry)
moonflower (Ipomoea alba)