A pause in a line determined by the natural rhythm of the diction. Example : "Two roads diverged // in a yellow wood" (Frost's "The Road Not Taken").
A caesura is a pause in a line of poetry or musical composition.
You cite examples. A site is a location. And sight is what your eyes provide.
Something that illustrates or explains what something else is or does.
An example is a term used to describe something relative to something else. If I try to tell you what a software is or any such term and you are not able to understand it, then I may take the use of...