telescope

Short definition from Wiktionary

Noun

1. 1
   A monocular optical instrument that magnifies distant objects, especially in astronomy.
2. 2
   Any instrument used in astronomy for observing distant objects (such as a radio telescope).
3. 3
   A retractable tubular support for lights.
4. 4
   A kind of goldfish with protruding eyes, first bred in China.

Verb

1. 1
   To extend or contract in the manner of a telescope.
2. 2
   To slide or pass one within another, after the manner of the sections of a small telescope or spyglass.
3. 3
   To come into collision, as railway cars, in such a manner that one runs into another.
4. 4
   To collapse, via cancellation.