plural lasers
: a device that produces a narrow and powerful beam of light that has many special uses in medicine, industry, etc.
doctors using a laser to perform delicate eye surgery
—often used before another nounlaser surgery
laser technology
Cite this Entry
“Laser.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/laser. Accessed 20 Jun. 2026.
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