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

Unless, of course, your car is equipped with a flux capacitor and plutonium is plentiful. Rosy Cordero,, "Listen to the first original song from the Back to the Future musical," 10 June 2019 The destroyers need a capacitor system to store and then quickly surge power to a laser. Kyle Mizokami, Popular Mechanics, "After Only 3 Years in Service, the USS Zumwalt’s Mission Is Changing," 17 May 2019 Making clean audio depends a lot of getting noise-free power, so EVGA uses AudioNote capacitors and resistors in the card as well as a Texas Instrument power-regulation circuit. Gordon Mah Ung, PCWorld, "EVGA gets into sound cards with Nu Audio, a high-end board that delivers 'lifelike' gaming," 8 Jan. 2019 Devices like game machines and smartphones have hundreds of the part known as a multilayer ceramic capacitor. Takashi Mochizuki, WSJ, "Can’t Find a PlayStation 4? Blame It On a Part Barely Bigger Than a Speck," 29 June 2018 There’s also German-made WIMA capacitors and AKM 4493 DACS and AKM 5572 ADCs. Gordon Mah Ung, PCWorld, "EVGA gets into sound cards with Nu Audio, a high-end board that delivers 'lifelike' gaming," 8 Jan. 2019 To handle this, the DRAM is refreshed multiple times per second to top up the capacitors and rewrite the values being stored. Peter Bright, Ars Technica, "New modification of the old cold boot attack leaves most systems vulnerable," 13 Sep. 2018 Supercapacitors work like normal capacitors — by accumulating electrical charge on their surface — but at a bigger scale. Angela Chen, The Verge, "Supercapacitors power the Note 9 stylus — but are they ready to replace batteries?," 17 Aug. 2018 As explained in a post on Imgur, this giant 27,000 joule mag-cannon comes in two parts, the 50-pound barrel and firing mechanism and a 200-pound bank of 56 400-volt, 6000-microfarad capacitors. Eric Limer, Popular Mechanics, "Mad Scientists Build Ludicrous 250-Pound DIY Railgun," 9 Nov. 2015

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.

See More

First Known Use of capacitor

1925, in the meaning defined above

Keep scrolling for more

Learn More about capacitor

Statistics for capacitor

Last Updated

23 Jun 2019

Look-up Popularity

Time Traveler for capacitor

The first known use of capacitor was in 1925

See more words from the same year

Keep scrolling for more

More Definitions for capacitor



English Language Learners Definition of capacitor

technical : 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

More from Merriam-Webster on capacitor Encyclopedia article about capacitor

Comments on capacitor

What made you want to look up capacitor? Please tell us where you read or heard it (including the quote, if possible).


appealing forcibly to the mind or reason

Get Word of the Day daily email!

Test Your Vocabulary

What's that Smell?! Quiz

  • wide eyed dog smelling rose
  • Someone who is hircine smells like a:
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!