Shade or a shadowed place where sunlight does not fall (e.g., under a tree or building).
暑い日は公園のベンチを日陰に移して休んだ。
On hot days I moved the park bench into the shade and rested.
洗濯物を日陰に干すと乾きにくい。
If you hang laundry in the shade, it dries slowly.
猫は日陰で丸くなって寝ている。
The cat is curled up sleeping in the shade.
(Less common/archaic) sunlight or a sunlit spot; in modern usage this meaning is limited or literary.
早朝の山道は日陰と日なたがくっきり分かれていた。
On the mountain path at dawn, the shaded areas and sunlit spots were clearly divided.
古い詩では『日陰』が日差しを意味する場合もある。
In old poetry, '日陰' sometimes means sunlight.