laser

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

laser

verb
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 laser had a warning on it, cautioning against direct eye exposure, the prosecutor said. oregonlive, 9 June 2021 Breakthroughs this week include physicists who achieved the highest intensity laser ever, and chemical engineers who catalyzed jet fuel from plastic waste. Lindsey Mcginnis, The Christian Science Monitor, 9 June 2021 Like a gigantic space laser, the letter beamed forth one unsupported statement after another and another and another. Bruce Y. Lee, Forbes, 6 June 2021 There is also a forward-facing laser to detect vehicles and road signs. Sebastian Blanco, Car and Driver, 4 June 2021 The memorial includes images of the war laser-etched onto a granite face. Sam Whiting, San Francisco Chronicle, 4 June 2021 This, plus smaller VCSEL (vertical-cavity surface-emitting laser) chips to power Face ID, should allow Apple to shrink the notch. Jacob Siegal, BGR, 3 June 2021 One was able to locate the origin of the laser using the Churchill Mapping System. Ayana Archie, The Courier-Journal, 2 June 2021 The Bruins, first to five postseason wins, are in stride, a team in full, with Rask laser-locked on shots, the No. 1 line cranking like the old Iron Horse in North Station at happy hour, and secondary scoring at the ready. BostonGlobe.com, 31 May 2021 Recent Examples on the Web: Verb Tuesday morning thanks to resurgent consumer demand, is falling 4% after a better-than-expected earnings report, as analysts laser in on a $9 million settlement with the SEcurities and Exchange Commision over misleading accounting practices. Jonathan Ponciano, Forbes, 4 May 2021 Guests can fight zombies or challenge friends to laser tag. Alex Demarban, Anchorage Daily News, 23 Apr. 2021 There are, of course, upsides to laser hair removal treatments and bikini waxes. Megan Gustashaw, Glamour, 20 Apr. 2021 But the Navy already has a bigger destroyer that can host everything from hypersonic missiles to laser weapons. Loren Thompson, Forbes, 6 Apr. 2021 My guide was able to laser in on the right ones for my ability level. Rebecca Misner, Condé Nast Traveler, 17 Mar. 2021 The team has been experimenting with different spacecraft materials to see how each reacts to laser pulse emissions called irradiation. Caroline Delbert And Courtney Linder, Popular Mechanics, 2 Mar. 2021 The Hall of Fame will schedule programming for the plaza — from viewing parties for NFL games to musical performances to nightly laser light shows synchronized with music from popular bands covering all genres. Barry Wilner, Star Tribune, 18 Sep. 2020 It’s not necessary to laser-scan objects with expensive instruments. Scott K. Johnson, Ars Technica, 6 Sep. 2020

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.

See More

First Known Use of laser

Noun

1957, in the meaning defined at sense 1

Verb

1978, in the meaning defined above

History and Etymology for laser

Noun

light amplification by stimulated emission of radiation

Keep scrolling for more

Learn More About laser

Statistics for laser

Last Updated

13 Jun 2021

Cite this Entry

“Laser.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/laser. Accessed 17 Jun. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for laser

laser

noun

English Language Learners Definition of laser

: a device that produces a narrow and powerful beam of light that has many special uses in medicine, industry, etc.

laser

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

Kids Definition of laser

: a device that produces a very powerful beam of light

laser

noun
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

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

WORD OF THE DAY

Test Your Vocabulary

Name that Thing: Dog Breeds

Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!