Definition of laser
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
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Examples of laser in a Sentence
doctors using a laser to perform delicate eye surgery
Origin and Etymology of laser
light amplification by stimulated emission of radiation
First Known Use: 1957
laser
Definition of laser
transitive verb
: to subject to the action of a laser : treat with a laser
1978
First Known Use of laser
1978
LASER Defined for English Language Learners
laser
playDefinition of laser for English Language Learners
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: a device that produces a narrow and powerful beam of light that has many special uses in medicine, industry, etc.
LASER Defined for Kids
laser
playDefinition of laser for Students
: a device that produces a very powerful beam of light
Medical Dictionary
laser
Medical Definition of laser
: 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
Medical Definition of laser
: 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
Learn More about laser
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See words that rhyme with laser Spanish Central: Translation of laser Nglish: Translation of laser for Spanish speakers Britannica English: Translation of laser for Arabic speakers Britannica.com: Encyclopedia article about laser
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