often attributive
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
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
: 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
Christopher McFadden, Interesting Engineering, 2 Nov. 2025
No aircraft has ever been reported to have crashed because of a laser strike.
—Ray Sanchez, CNN Money, 2 Nov. 2025
Brad Lendon, CNN Money, 3 Sep. 2025
Homelander found some of her breast milk in a freezer and lasers it, starts drinking it, gets caught.
—Brian Hiatt, Rolling Stone, 30 June 2024
See All Example Sentences for laser
Examples are automatically compiled from online sources to
show current usage.
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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Noun
French unmanned aerial vehicle (UAV) payload maker Merio has unveiled a laser designation system small and light enough to be mounted on drones.
—Christopher McFadden, Interesting Engineering, 2 Nov. 2025
No aircraft has ever been reported to have crashed because of a laser strike.
—Ray Sanchez, CNN Money, 2 Nov. 2025
Verb
From hypersonic missiles, nuclear-capable weapons to laser air defense systems, the array of sophisticated weaponry on display – much of it unveiled to the public for the first time – offered a rare glimpse into the rapid advances of China’s military technology under Xi.
—Brad Lendon, CNN Money, 3 Sep. 2025
Homelander found some of her breast milk in a freezer and lasers it, starts drinking it, gets caught.
—Brian Hiatt, Rolling Stone, 30 June 2024
See All Example Sentences for laser
Cite this Entry
“Laser.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/laser. Accessed 4 Nov. 2025.
Copy CitationKids Definition
laser
1 of 2 noun
la·ser
ˈlā-zər 
: a device that uses the natural vibrations of atoms or molecules to generate a narrow beam of light having a small frequency range
laser
2 of 2 verb
: to subject to the action of a laser
Etymology
Noun
light amplification by stimulated emission of radiation
Medical Definition
laser
1 of 2 noun
la·ser
ˈlā-zər
: 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
laser
2 of 2 transitive verb
: 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
Jenny ManzerLove words? Need even more definitions?
Merriam-Webster unabridged
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