A side dish — food served alongside the main dish, such as vegetables, beans, or pickles.
定食にはご飯と主菜のほかに副菜が二品付いていた。
The set meal came with rice, a main dish, and two side dishes.
ヘルシーにするために、副菜を野菜中心に選んだ。
To be healthy, I chose vegetable-based side dishes.
副菜は味付けが濃すぎないものが主菜とよく合う。
Side dishes that aren't too strongly seasoned go well with the main dish.