C1noun2K

Laser

UK /["/ˈleɪzə(r)/"]/US /["/ˈleɪzər/"]/

Definition

a device that gives out light in which all the waves oscillate (= change direction and strength) together, typically producing a powerful beam of light that can be used for cutting metal, in medical operations, etc.

In simple words: A strong, focused beam of light.

Examples

  • a laser beam
  • a laser navigation device
  • The barcodes on the products are read by lasers.
  • a **laser show** *(= used as entertainment)*
  • She's had **laser surgery** on her eye.
  • **laser treatment/therapy**

Usage notes

Use 'laser' in scientific or technical contexts. It's appropriate when discussing light technology, medical procedures, or industrial applications. Avoid using it in casual conversations unrelated to these topics.

Grammar pattern

standalone noun

Memory hint

Think of a 'laser' as a 'light razor' that cuts through the dark.

Collocations

  • powerful
  • infrared
  • use
  • aim
  • fire
  • beam
  • blast
  • light

Synonyms

  • light beam
  • high-intensity light
  • coherent beam

Antonyms

  • diffuse light
  • scattered light

Common mistakes

  • Confused with 'lazer', which is a mispronunciation.
  • Using 'laser' as a verb incorrectly.
  • Misunderstanding its function, thinking all lights are lasers.