Which aspect is incorporated into the most complete single-sentence definition of a telescope?

Answer

It must make distant objects appear nearer or larger by collecting and focusing light.

The most complete definition synthesizes the function (nearer/larger result) and the physics (light collection and focusing) achieved typically using lenses or mirrors.

Which aspect is incorporated into the most complete single-sentence definition of a telescope?
Definitionastronomytelescopeinstrumentoptics