The condition of being clear or transparent is transparency. The transparency of your car's windshield might be affected by how badly your car needs to be washed.
Something has transparency if you can see through it, like the ice on the top of a frozen lake or a glass. Transparency can also refer to a figurative kind of clearness or openness, which is what people mean when they talk about "government transparency." If you can see clearly, without anything being hidden, what you're looking at (or through) has transparency. Its root is the Latin word transparentem, which means "see light through."
Primary Meanings of transparency
the quality of being clear and transparent
permitting the free passage of electromagnetic radiation
n picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector
lantern slide, slide
a transparency mounted in a frame; viewed with a slide projector
a transparency for use with an overhead projector