Meaning of “laser” in the English Dictionary

american-english dictionary

"laser" in British English

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lasernoun [ C ]

uk /ˈleɪ.zər/ us /-zɚ/

B2 (a device that produces) a powerful, narrow beam of light that can be used as a tool to cut metal, to perform medical operations, or to create patterns of light for entertainment:

laser beam
laser surgery

More examples

  • The tube that carries the laser is introduced into the abdomen through a small cut in the skin.
  • The laser beam heals the eye painlessly.
  • The laser guidance system dramatically increases the likelihood that the missile will strike home.
  • During surgery, doctors sometimes use a laser beam to vaporize tiny blood vessels.
  • There was a laser show by the harbour.

(Definition of “laser” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"laser" in American English

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lasernoun [ C ]

us /ˈleɪ·zər/

physics a device that produces a powerful, highly controlled, narrow beam of light:

a laser beam
Doctors destroyed the tumor with a laser.

(Definition of “laser” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"laser" in Business English

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lasernoun [ C ]

uk /ˈleɪzər/ us

a device that produces a powerful narrow beam of light that can be used as a tool, for example to cut metal, to perform medical operations, etc. The beam of light is also known as a laser:

It shines a laser beam on to the surface of the disc to read the pattern of the bumps.
Our team are engaged in the research of laser technology.
They now use a laser gun for reading barcodes.

(Definition of “laser” from the Cambridge Business English Dictionary © Cambridge University Press)