Definition of: telescope

(tel′ə·skōp) noun
1. An optical instrument for enlarging the telescope of a distant object, consisting of an object glass for collecting light beams from the object and an eyepiece for viewing the telescope. The refracting telescope transmits the rays to a focus through a combination of lenses called the object glass; the reflecting telescope brings them to a focus by reflection from a concave mirror.
2. A valise or traveling bag that shuts with one section inside the other, and thus can be extended, like a telescope.
—v. ·scoped, ·scop·ing v.t.
1. To drive or slide together so that one part fits into another in the manner of the sections of a small telescope.
2. To crush by driving something into or upon.
3. To represent in a compressed or shortened form, as a period of time.
—v.i.
4. To crash or be forced into one another, as railroad cars in a collision. [<TELE- + -SCOPE]
REFRACTING TELESCOPE
Yerkes Observatory 40 inch.