noun, often attributive
la·​ser | \ ˈlā-zər How to pronounce laser (audio) \

Definition of laser

 (Entry 1 of 2)

1 : a device that utilizes the natural oscillations of atoms or molecules between energy levels for generating a beam of coherent electromagnetic radiation usually in the ultraviolet, visible, or infrared regions of the spectrum also : the beam of coherent radiation itself The cesium fluoresced. This told them they had the necessary population of excited atoms to produce a laser. — Nick Taylor
2 : something resembling a laser beam in accuracy, speed, or intensity threw a laser into the end zone a laser stare


lasered; lasering; lasers

Definition of laser (Entry 2 of 2)

transitive verb

: to subject to the action of a laser : treat with a laser

Examples of laser in a Sentence

Noun doctors using a laser to perform delicate eye surgery
Recent Examples on the Web: Noun The body of the system is meant to evoke the shape of a classic arcade cabinet and is laser-cut out of cardboard for easy assembly. Jennifer Ouellette, Ars Technica, 3 Aug. 2022 Altered Combat, a company out of Buckeye, will offer laser tag during the event. Laura Latzko, The Arizona Republic, 28 July 2022 Although it is known for its indoor trampoline arena, guests can also experience bumper cars, laser tag, a sky-high ropes course and rock climbing. Gabi De La Rosa, Chron, 23 July 2022 Enjoy live music, food, ThrillAmaze roller skate and laser tag, arts, crafts, games and more. Chicago Tribune, 14 June 2022 Right now, the experiences available to those users are relatively rudimentary, mostly involving games like virtual laser tag or events like digital dance parties. Jeremy Kahn, Fortune, 13 June 2022 This year, there's also a laser tag bounce house and a foam garage where the whole family can play in non-toxic foam. Luann Gibbs, The Enquirer, 1 June 2022 The show was an explosive, sci-fi circus rife with majestic dystopian themes, and laser-tag neon lighting. Will "ill Will" Lavin, Rolling Stone, 26 May 2022 There’s also laser tag, pool parties with DJ and water slides, a zip line trail and relic dig with snacks and treats. Ramsey Qubein, Forbes, 22 May 2022 Recent Examples on the Web: Verb Their goal is to destroy the weapon the Soviets are using to laser a hole into the Upside Down to somehow harness the monsters therein for war or whatever. Helena Andrews-dyer, Washington Post, 27 May 2022 The medspa offers everything from Botox and hydrafacials to laser hair removal and peels. John-john Williams Iv, Baltimore Sun, 21 Apr. 2022 And that brings us to laser hair removal, a popular semi-permanent option that damages hair follicles to minimize hair growth. Jessica Cruel, SELF, 25 Jan. 2022 After trying many other tactics to get rid of the crows, the town is now moving to laser pointers. Justin Ray, Los Angeles Times, 18 Jan. 2022 Rather, resources can laser focused on enforcing its community standards against crime, bullying, and other negative social behavior, a win-win for society and for Facebook’s reputation. Nelson Granados, Forbes, 11 Oct. 2021 Jonn Edmunds and his friends grew up playing with water guns, then laser tag in the family’s big yard. Mead Gruver, Thomas Peipert, Anchorage Daily News, 11 Sep. 2021 This isn’t the first time JVC has turned to laser lighting for a projector; that honor belongs to the high-end DLA-RS4500 (DLA-Z1 in Europe) launched way back in 2017. John Archer, Forbes, 2 Sep. 2021 With a wide array of specimens and artifacts, the museum chronicles the history and practice of medicine, from leeches to laser surgery. Washington Post, 5 Aug. 2021 See More

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

First Known Use of laser


1957, in the meaning defined at sense 1


1978, in the meaning defined above

History and Etymology for laser


light amplification by stimulated emission of radiation

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Dictionary Entries Near laser



laser beam

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Statistics for laser

Last Updated

12 Aug 2022

Cite this Entry

“Laser.” Dictionary, Merriam-Webster, Accessed 13 Aug. 2022.

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More Definitions for laser


la·​ser | \ ˈlā-zər How to pronounce laser (audio) \

Kids Definition of laser

: a device that produces a very powerful beam of light


la·​ser | \ ˈlā-zər \

Medical Definition of laser

 (Entry 1 of 2)

: a device that utilizes the natural oscillations of atoms or molecules between energy levels for generating coherent electromagnetic radiation usually in the ultraviolet, visible, or infrared regions of the spectrum


transitive verb

Medical Definition of laser (Entry 2 of 2)

: to subject to the action of a laser : treat with a laser cutting a corneal flap to remove tissue and then lasering the area under it— Jenny Manzer


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