1 telescope | Definition of telescope

telescope

noun, often attributive
tele·​scope | \ ˈte-lə-ˌskōp How to pronounce telescope (audio) \

Definition of telescope

 (Entry 1 of 2)

1 : a usually tubular optical instrument for viewing distant objects by means of the refraction of light rays through a lens or the reflection of light rays by a concave mirror — compare reflector, refractor
2 : any of various tubular magnifying optical instruments

telescope

verb
telescoped; telescoping

Definition of telescope (Entry 2 of 2)

intransitive verb

1 : to become forced together lengthwise with one part entering another as the result of collision
2 : to slide or pass one within another like the cylindrical sections of a collapsible hand telescope
3 : to become compressed or condensed

transitive verb

1 : to cause to telescope

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Examples of telescope in a Sentence

Noun

The rings of Saturn can be seen through a telescope.

Verb

for dramatic purposes, the film telescopes the years over which the events occurred into a few short months

Recent Examples on the Web: Noun

The research team has been watching the parent star with several different telescopes since the 1990s. Mike Wall, Scientific American, "Newfound Alien Planet Has a Bizarre Looping Orbit," 28 Aug. 2019 To Native Hawaiians, putting a giant telescope on their sacred mountain is a desecration. Los Angeles Times, "A battle for the heavens on Mauna Kea: Native Hawaiians protest plans for a massive telescope," 15 Aug. 2019 What Narkevic and Lorimer found was the first of many bizarre, ultra-powerful flashes detected by our telescopes. Wired, "An Alien-Hunting Tech Mogul May Help Solve a Space Mystery," 21 July 2019 Later plans set a limit of 13 telescopes on the summit and restricted their size. Daniel Clery, Science | AAAS, "Divisive giant telescope cleared for construction on Hawaiian peak," 25 June 2019 Scientists first reported detections of methane on Mars a decade and a half ago using measurements from Mars Express, an orbiting spacecraft built by the European Space Agency and still in operation, as well as from telescopes on Earth. Martin Finucane, BostonGlobe.com, "Did a rover on Mars just sniff out life?," 24 June 2019 Thanks to a powerful telescope on earth and a galaxy acting as a gravitational lens, scientists have been able to observe the quasar despite its distance of 12.8 billion light-years away from Earth. David Grossman, Popular Mechanics, "Scientists Have Spotted Some of the Oldest Light in the Universe," 10 Jan. 2019 As part of Breakthrough Watch, the organization is studying a small coronagraph-carrying space telescope akin to ACESat. Corey S. Powell, Scientific American, "The Hunt Is on for Alpha Centauri’s Planets," 5 Aug. 2019 The planet’s famous rings can be seen easily with small telescopes. Arnold Pearlstein, sun-sentinel.com, "The Stars This Week: Aug. 4-10," 4 Aug. 2019

Recent Examples on the Web: Verb

It’s hard to describe—hard to fathom, even—that a single image can telescope in on itself the way this painting does. Duff Mcdonald, WIRED, "The Cosmic, Psychedelic, Glow-in-the-Dark Art of Alex Aliume," 20 Aug. 2019 The wheeled bag has a telescoping pull handle; the roomy duffel’s external sleeve slides over the telescoping handle of any wheeled bag. Los Angeles Times, "Gear that keeps clothes neat, you cool, and your feet and your dog happy," 18 July 2019 Their toothless mouths telescope out and vacuum up anything from worms to mussels. Fox News, "Sturgeon, America's forgotten dinosaurs, are showing signs of life," 10 July 2019 Each additional observatory makes that equivalent telescope bigger and more sensitive. Avery Thompson, Popular Mechanics, "Behind the Scenes of the First Black Hole Photo," 12 Apr. 2019 The red steel pillars of the station hurtled by, and then the grotty cavern walls of the tunnel, its bare light bulbs and heavy cables telescoping past. William Finnegan, The New Yorker, "Can Andy Byford Save the Subways?," 2 July 2018 Justices are already considering another appeal challenging the state land board’s decision to allow the University of Hawaii to sublease mountaintop land to telescope builders. Washington Post, "Giant telescope project before Hawaii Supreme Court again," 21 June 2018 The vehicle is heavily armed, with a 40-millimeter gun firing cased telescoped ammunition. Kyle Mizokami, Popular Mechanics, "France’s New Armored Car Does Not Mess Around," 17 May 2018 That car, which bowed in 1989, was priced well below its competitors and offered Japanese reliability alongside new features such as an automatic tilt-and-telescoping steering wheel and power-adjustable seat belts. Daniel Miller, latimes.com, "The Genesis G90 is a luxurious opening act for the new brand — and definitely not a Hyundai," 11 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'telescope.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of telescope

Noun

1650, in the meaning defined at sense 1

Verb

1866, in the meaning defined at intransitive sense 1

History and Etymology for telescope

Noun

New Latin telescopium, from Greek tēleskopos farseeing, from tēle- tele- + skopos watcher; akin to Greek skopein to look — more at spy

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More Definitions for telescope

telescope

noun

English Language Learners Definition of telescope

 (Entry 1 of 2)

: a device shaped like a long tube that you look through in order to see things that are far away

telescope

verb

English Language Learners Definition of telescope (Entry 2 of 2)

: to become shorter by having one section slide inside another somewhat larger section
: to make (something) shorter in length or time

telescope

noun
tele·​scope | \ ˈte-lə-ˌskōp How to pronounce telescope (audio) \

Kids Definition of telescope

 (Entry 1 of 2)

: a piece of equipment shaped like a long tube that has lenses for viewing objects at a distance and especially for observing objects in outer space