Leaves that have fallen from trees; leaf litter or fallen leaves, typically seen in autumn.
秋になると公園に落ち葉がたくさん積もる。
In autumn, many fallen leaves pile up in the park.
子どもたちは落ち葉の山で遊んだ。
The children played in a pile of fallen leaves.
風で落ち葉が舞っていてとてもきれいだった。
Fallen leaves were fluttering in the wind and it was very beautiful.
落ち葉を集めて袋に入れた。
I gathered the fallen leaves and put them in a bag.
The process or event of leaves falling (leaf fall, defoliation); used as a noun or in constructions like 落葉する.
この樹は十一月に落葉する。
This tree sheds its leaves in November.
台風のせいで落葉が早まった。
Because of the typhoon, the leaf fall came earlier than usual.
市の作業員が街路樹の落ち葉を掃除している。
City workers are cleaning up the fallen leaves from the street trees.
Used to describe the deciduous property (落葉/らくよう) of plants, e.g., 落葉樹 (deciduous tree).
落葉樹は冬になると葉を全部落とす。
Deciduous trees lose all their leaves in winter.
この庭には落葉樹が多く、秋は色づいて美しい。
There are many deciduous trees in this garden, and they turn beautiful colors in autumn.