Illustration of light bulb
- 1 bulb containing gas
- 2 filament
- 3 connecting and supporting wires
- 4 exhaust tube
- 5 screw base
- 6 base contact
light bulb
noun
variants
or lightbulb
plural light bulbs or lightbulbs
: 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
b
: one having a coating of fluorescent material on its inner surface that emits visible light : fluorescent lamp
especially
: compact fluorescent light
c
: one using LEDs to generate light
Examples of light bulb in a Sentence
Recent Examples on the Web
The technology has already been utilized to print a circuit board that was used to power a light bulb.
—
Ben Coxworth, New Atlas, 1 Aug. 2024
Sadler recalled being threatened with a violation after asking the former maintenance man to replace a light bulb in her apartment.
—Noelle Alviz-Gransee, Kansas City Star, 31 May 2024
Perhaps the most famous object in the museum’s collection is a light bulb that has never burned out for 115 years.
—Lillie Davidson, Fort Worth Star-Telegram, 22 July 2024
But tell me, was there a light bulb moment in your life?
—Scott Roxborough, The Hollywood Reporter, 9 July 2024
See all Example Sentences for light bulb 
Ben Coxworth, New Atlas, 1 Aug. 2024
Sadler recalled being threatened with a violation after asking the former maintenance man to replace a light bulb in her apartment.
—Noelle Alviz-Gransee, Kansas City Star, 31 May 2024
Perhaps the most famous object in the museum’s collection is a light bulb that has never burned out for 115 years.
—Lillie Davidson, Fort Worth Star-Telegram, 22 July 2024
But tell me, was there a light bulb moment in your life?
—Scott Roxborough, The Hollywood Reporter, 9 July 2024
See all Example Sentences for light bulb
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'light bulb.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Light bulb.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/light%20bulb. Accessed 18 Aug. 2024.
Copy CitationKids Definition
lightbulb
noun
light·bulb
ˈlīt-ˌbəlb 
: an electric lamp: as
a
: one in which a filament gives off light when heated by an electric current
called also incandescent lamp
b
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