The same in every direction, with no special orientation.
The rubber ball is isotropic because it bounces the same way no matter which way you drop it.
고무공은 각방향으로 동일하게 튀기 때문에 이성이 있습니다.
In science, something that works the same way no matter which way you look at it.
The glass is isotropic, so light passes through it the same in every direction.
유리는 각방향으로 동일하게 빛을 통과시키므로 이성입니다.