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 British entrepreneur’s second light bulb moment came on a family day out with his two kids at a VR experience on a wet Sunday afternoon.
—
Orianna Rosa Royle, Fortune Europe, 24 Mar. 2024
In his experiment, Sener conducted three trials with two different light bulb wattages, 50 watts and 100 watts.
—Taylor Nicioli, CNN, 8 Mar. 2024
Look through your solar glasses at a glowing light bulb.
—John Tufts, The Indianapolis Star, 29 Feb. 2024
The roughly 8,000-square-foot space is lined with cleaning supplies, light bulbs, toilet seats, paints, and hardware and bolts.
—Brianna Taylor, Sacramento Bee, 23 Jan. 2024
That first pickup quickly expanded to include trips to recycle light bulbs, electronics, plastic bags and Halloween candy.
—Carly Olson, Los Angeles Times, 15 Jan. 2024
Tens of thousands of people around the country already get everything from lunchtime goodies and quick replacement light bulbs to vaccines and prescriptions via drone.
—Jennifer Jolly, USA TODAY, 4 Apr. 2024
The temperature of the cardboard during with just the heating lamp and the 100-watt light bulb and no mirrors was about 81 degrees Fahrenheit (27.2 degrees Celsius).
—Taylor Nicioli, CNN, 8 Mar. 2024
For reference, a standard 60-watt light bulb gives off about 800 lumens.
—Pamela Porter, Better Homes & Gardens, 21 Mar. 2024
Orianna Rosa Royle, Fortune Europe, 24 Mar. 2024
In his experiment, Sener conducted three trials with two different light bulb wattages, 50 watts and 100 watts.
—Taylor Nicioli, CNN, 8 Mar. 2024
Look through your solar glasses at a glowing light bulb.
—John Tufts, The Indianapolis Star, 29 Feb. 2024
The roughly 8,000-square-foot space is lined with cleaning supplies, light bulbs, toilet seats, paints, and hardware and bolts.
—Brianna Taylor, Sacramento Bee, 23 Jan. 2024
That first pickup quickly expanded to include trips to recycle light bulbs, electronics, plastic bags and Halloween candy.
—Carly Olson, Los Angeles Times, 15 Jan. 2024
Tens of thousands of people around the country already get everything from lunchtime goodies and quick replacement light bulbs to vaccines and prescriptions via drone.
—Jennifer Jolly, USA TODAY, 4 Apr. 2024
The temperature of the cardboard during with just the heating lamp and the 100-watt light bulb and no mirrors was about 81 degrees Fahrenheit (27.2 degrees Celsius).
—Taylor Nicioli, CNN, 8 Mar. 2024
For reference, a standard 60-watt light bulb gives off about 800 lumens.
—Pamela Porter, Better Homes & Gardens, 21 Mar. 2024
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.
Dictionary Entries Near light bulb
Cite this Entry
“Light bulb.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/light%20bulb. Accessed 25 Apr. 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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