ca·​pac·​i·​tor | \ kə-ˈpa-sə-tər How to pronounce capacitor (audio) \

Definition of capacitor

: a device that is used to store electrical energy

Examples of capacitor in a Sentence

Recent Examples on the Web The motor and capacitor add just 75 pounds to the powertrain's mass, but the system doesn't have enough juice for pure electric operation. Mike Duff, Car and Driver, 13 Aug. 2021 This machine is the world’s largest Z-pinch, a plasma physics device originally designed to study nuclear fusion—basically a soup-can-sized wire cage sitting on top of a warehouse-sized series of capacitor banks. Adam Frank, Scientific American, 21 July 2021 Same as the lithium-ion batteries in an iPhone or Tesla Model 3, a capacitor is a way to store energy. The Popular Mechanics Editors, Popular Mechanics, 18 May 2021 Once the beast slaps off Hunter’s mask, however, Omega has to go it alone—her own brief True Grit moment—to retrieve the capacitor. Alex Kane, USA TODAY, 14 May 2021 If the organoleptic hop transducer module sounds like something that screws into Doc Brown’s flux capacitor, there is an element of looking back in the future of Dogfish Head Miami. Ben Crandell,, 12 May 2021 Interestingly, Dell has also built a charging cubby into the keyboard specifically for its Detachable Active Pen, which charges almost instantaneously—in thirty seconds!—while docked inside the cubby, using capacitor technology. Mark Hachman, PCWorld, 27 Apr. 2021 One particularly unglamorous widget, a type of ceramic capacitor that ordinarily sells for around 3 cents each, became hard to find when a Covid-19 outbreak temporarily closed a factory in China. New York Times, 15 Apr. 2021 The capacitor shortage hurt production of a popular cellular modem. New York Times, 15 Apr. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'capacitor.' 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 capacitor

1925, in the meaning defined above

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Time Traveler for capacitor

Time Traveler

The first known use of capacitor was in 1925

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Dictionary Entries Near capacitor



capacitor motor

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Statistics for capacitor

Last Updated

18 Aug 2021

Cite this Entry

“Capacitor.” Dictionary, Merriam-Webster, Accessed 24 Sep. 2021.

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More Definitions for capacitor



English Language Learners Definition of capacitor

: a device that is used to store electrical energy


ca·​pac·​i·​tor | \ kə-ˈpas-ət-ər How to pronounce capacitor (audio) \

Medical Definition of capacitor

: a device giving capacitance and usually consisting of conducting plates or foils separated by thin layers of dielectric (as air or mica) with the plates on opposite sides of the dielectric layers oppositely charged by a source of voltage and the electrical energy of the charged system stored in the polarized dielectric

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