light bulb

noun
\ ˈlīt-ˌbəlb \
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

Incandescent light bulbs might give off a nice homey glow, but only 5 percent of their energy consumption is actually converted into light. Barbara Eldredge, Curbed, "How to save on utility bills," 25 Jan. 2019 Solar panels have been installed on roofs, energy efficient light bulbs are lowering electric bills, food waste is being composted and a wind farm off the coast of Cleveland is in development. cleveland.com, "13 organizations making Northeast Ohio greener," 10 Apr. 2018 Add an eerie glow to your costume by hot gluing miniature LED light bulbs to a coin cell battery. Milwaukee Journal Sentinel, "Be a maker: 5 fun ideas for kid-made projects," 15 Sep. 2017 Just one dryer load is equivalent to turning on 225 light bulbs for an hour. The Seattle Times, "Little changes can make a big difference in climate change," 24 Sep. 2018 Whereas in the #makeuptrailer, the lights are natural light bulbs. Janell Hickman, Allure, "Taraji P. Henson's Makeup Artist, Ashunta Sheriff, Had the Perfect Response for Trolls Who Questioned Her Talent," 25 Aug. 2018 What’s the deal with all these energy-efficient light bulbs? Henry Gifford, Popular Mechanics, "Your House Is Bleeding You Dry. Here Are 9 Steps To Save You Money.," 8 Aug. 2018 The bow teeter-totters delicately over two large industrial light bulbs planted in a crude wooden bowl. Joseph Giovannini, New York Times, "Swiss Institute Has a New Home Ready-Made for Art," 28 June 2018 Recyclers quickly stripped their wiring, while others unscrewed light bulbs to be proudly dangled on cords around their necks. Washington Post, "AP PHOTOS: Nicaraguans battle over symbols amid unrest," 15 June 2018

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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Last Updated

8 Feb 2019

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Time Traveler for light bulb

The first known use of light bulb was in 1884

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More Definitions for light bulb

light bulb

noun

English Language Learners Definition of light bulb

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

light bulb

noun

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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