A Shield (シールド, Shīrudo) refers to a construct which is meant to protect something from harm. Shields can be physical or non-physical in their construction. Certain spaceships have shields which project a field that protects the ship from attack.
When an energy shield is activated, it is projected outwards from the target, usually in the form of a spherical field if it is fully enveloping the target. When beams contact the edge of the shield, they are either blocked or deflected around the shield .