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 Wyze Bulbs bulbs for around $15 each, but who uses just one smart light bulb? Maren Estrada, BGR, "The company behind the $26 Wyze Cam now makes LED smart bulbs for $9.50 each," 30 Mar. 2021 My light bulb moment happened… at a Harvard Medical School conference in 2012. Ali Francis, Bon Appétit, "This Doctor-Turned-Chef Finds Medical Wisdom in Her Spice Cabinet," 16 Mar. 2021 Thomas Edison did not figure out the light bulb by doing the same thing twice. Samantha Olson, Seventeen, "How Michelle Morgan is Transforming Advertising & Media," 26 Feb. 2021 For example, shut down your laptop when the smart light bulb installed in your lamp turns itself off. Expert Panel®, Forbes, "14 Pandemic-Induced Work Habits (And How To Break Them)," 26 Feb. 2021 The reporting party provided video of a man screwing in a light bulb to light up the driveway. Star Tribune, "Twin Cities metro police blotter, Jan. 17," 16 Jan. 2021 But after a friend bought one of the spice mixes, a light bulb went off. Sharyn Jackson, Star Tribune, "Stock your fridge and pantry with these 12 products made by Twin Cities restaurants," 15 Jan. 2021 An hour later, the video showed another man unscrewing the light bulb. Star Tribune, "Twin Cities metro police blotter, Jan. 17," 16 Jan. 2021 Every other light bulb across a wide swath of northeastern and central Minnesota is now powered exclusively by wind, solar and hydro electricity. Brooks Johnson, Star Tribune, "Minnesota Power reaches 50% renewable energy," 16 Dec. 2020

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.

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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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Statistics for light bulb

Last Updated

13 Apr 2021

Cite this Entry

“Light bulb.” Dictionary, Merriam-Webster, Accessed 20 Apr. 2021.

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More Definitions for light bulb

light bulb


English Language Learners Definition of light bulb

: a glass bulb or tube that produces light when it is supplied with electricity

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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