light bulb

\ ˈlīt-ˌbəlb How to pronounce light bulb (audio) \
variants: or lightbulb

Definition of light bulb

: an electric lamp: such as
a : one in which a filament gives off light when heated to incandescence by an electric current

called also incandescent, incandescent lamp

Illustration of light bulb

Illustration of light bulb

light bulb (incandescent): 1 bulb containing gas, 2 filament, 3 connecting and supporting wires, 4 exhaust tube, 5 screw base, 6 base contact

Examples of light bulb in a Sentence

Recent Examples on the Web Take the incandescent light bulb, which has been actively phased out by American, British and several European governments in recent years due to concerns around energy efficiency. Megan C. Hills, CNN, 10 June 2022 Assembling a Team After reading an article on the power of hiring experts and getting out of the way, a light bulb moment occurred for Adel. Rod Berger, Forbes, 6 June 2022 When attached at either end to a circuit such as a light bulb, the zinc inside reacts with the manganese dioxide and loses electrons. Manasee Wagh, Popular Mechanics, 13 May 2022 The bulk of those creations fall between 1850-1920: skyscrapers, the record player, the radio, the airplane, the light bulb. Tom Roland, Billboard, 7 June 2022 The light bulb was patented, the telephone was invented, wages skyrocketed — and seemingly instantaneous, so did skyscrapers and fortunes. Jen Juneau,, 22 Apr. 2022 Village residents can go to the police department to pick up a light bulb – a supply of which the chief said was donated by Signify North America Corporation, a lighting company. Jesse Wright, Chicago Tribune, 9 May 2022 This is what the unsuspecting incandescent light bulb has wrought. Michael Smolenscolumnist, San Diego Union-Tribune, 29 Apr. 2022 As the shaking camera panned to show a bare light bulb and concrete walls, the mother narrated in a whisper. Cara Anna,, 24 Mar. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'light bulb.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of light bulb

1884, in the meaning defined above

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Time Traveler for light bulb

Time Traveler

The first known use of light bulb was in 1884

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Dictionary Entries Near light bulb

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light bulb

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Statistics for light bulb

Last Updated

24 Jun 2022

Cite this Entry

“Light bulb.” Dictionary, Merriam-Webster, Accessed 27 Jun. 2022.

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More Definitions for light bulb

light bulb


Kids Definition of light bulb

: a lamp in which a glow is produced by the heating of a wire by an electric current

More from Merriam-Webster on light bulb

Thesaurus: All synonyms and antonyms for light bulb


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