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laser - definition and synonyms


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noun [countable] physics laser pronunciation in British English /ˈleɪzə(r)/
Word Forms
  1. [usually before noun] a piece of equipment that produces a powerful narrow line of light. It is used for cutting hard substances, directing the paths of missiles, and in medical operations

    The cancer cells are destroyed by a tiny laser.

    New laser eye surgery can correct your vision.

    laser beam:

    Computer technology and laser beams can be used to control the weather.

    laser display (=patterns of coloured lights):

    The crowd enjoyed the fireworks and the laser display.

derived word



to fall over forwards so that your face hits the ground or another surface

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the activity of exploring abandoned buildings and other manmade structures

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