How do you spell Telescope

Available Definitions:
1)  n. - An optical instrument used in viewing distant objects, as the heavenly bodies.
2)  a. - To slide or pass one within another, after the manner of the sections of a small telescope or spyglass; to come into collision, as railway cars, in such a manner that one runs into another.
3)  v. t. - To cause to come into collision, so as to telescope.