A small grove or thicket of mixed trees (a coppice or copse), typically a natural stand of various tree species.
駅の裏に小さな雑木林があって、春になると花がきれいに咲く。
There's a small grove behind the station, and in spring the flowers bloom beautifully.
子どもたちは放課後、近所の雑木林で虫を捕って遊んだ。
After school the kids played catching insects in the nearby thicket.
その公園は広場の隣に雑木林があり、四季折々の景色が楽しめる。
Next to the park's plaza there's a grove of mixed trees where you can enjoy seasonal scenery.