1. I-adjective (keiyoushi)

   round; circular; spherical

   丸い usu. refers to ball-shaped, and 円い to disc-shaped objects

   コロンブスは地球が丸いと信じていた。

2. curved; smooth

3. harmonious; calm; peaceful; amiable; amicable

   see 丸く収まる

Also written 円い【まるい】marui