Definition of “light bulb” - English Dictionary

british dictionary

“light bulb” in British English

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light bulbnoun [ C ]

uk /ˈlaɪt ˌbʌlb/ us /ˈlaɪt ˌbʌlb/ also bulb

Examples from literature

  • Before the invention of the light bulb, you had to watch plays during the day when it was light outside. 
  • Before the light bulb, people did not do much at night because it was dark. 
  • Changing the light bulbs in your room can help you sleep. 
  • Finally, in 1879, Thomas Edison invented a safe and easy way to use the electric light bulb. 
  • If you look at a picture of our planet from space at night, you can see how the light bulb changed life on Earth. 
  • Laser light does not spread out like natural light or light from a light bulb. 
  • People used candles for light at night until the light bulb was invented. 
  • Try changing the light bulbs in your bedroom. 

(Definition of “light bulb” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“light bulb” in American English

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light bulbnoun [ C ]

also lightbulb /ˈlɑɪtˌbʌlb/

a rounded glass container that produces light when an electric current is passed through it

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