trans·​form·​er | \ tran(t)s-ˈfȯr-mər How to pronounce transformer (audio) \

Definition of transformer

: one that transforms specifically : a device employing the principle of mutual induction to convert variations of current in a primary circuit into variations of voltage and current in a secondary circuit

Examples of transformer in a Sentence

Recent Examples on the Web

Older transformers can explode when their insulating materials begin to fail. Cassie Rodenberg, Popular Mechanics, "How Transformers Can Explode," 28 Dec. 2018 At one site, nine electrical transformers had been torn from posts, their copper parts gutted, disabling vital control systems. New York Times, "Workers Flee and Thieves Loot Venezuela’s Reeling Oil Giant," 14 June 2018 That was the first face tracker and face transformer that ever existed. Eric Johnson, Recode, "If you can quit social media, but don’t, then you’re part of the problem, Jaron Lanier says," 27 July 2018 The trouble should have stopped there but a circuit breaker failed to trigger, allowing the short circuit to reach a transformer, where another circuit breaker did activate. Kevin Spear,, "Orlando downtown power outage for thousands: initially a mystery and now explained," 28 June 2018 The voltage is lowered again by transformers on power poles, and then the power is fed into buildings through meters that keep track of consumption. David Roberts, Vox, "Clean energy technologies threaten to overwhelm the grid. Here’s how it can adapt.," 30 Nov. 2018 Charging up the newest big iPhone takes so long because that 5-watt transformer only sends a trickle of electrons. Alexander George, Popular Mechanics, "Anker's Powerport II Is the Only Charger You'll Ever Need," 9 Nov. 2018 Construction on a transformer station for the new mega-plant, known as Paks 2, began this summer. Marcus Walker, WSJ, "In Orban’s Hungary, a Glimpse of Europe’s Demise," 9 Aug. 2018 There was only a vast sea of debris: wooden beams filled with nails, shattered toilets and glass, concrete rubble, uprooted trees, twisted power transformers. Todd Pitman, Fox News, "AP WAS THERE: 2013 typhoon kills thousands in Philippines," 15 Sep. 2018

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

1596, in the meaning defined above

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Last Updated

7 Mar 2019

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Time Traveler for transformer

The first known use of transformer was in 1596

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More Definitions for transformer



English Language Learners Definition of transformer

technical : a device that changes the voltage of an electric current


trans·​form·​er | \ trans-ˈfȯr-mər How to pronounce transformer (audio) \

Kids Definition of transformer

: a device for changing the voltage of an electric current

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More from Merriam-Webster on transformer

Rhyming Dictionary: Words that rhyme with transformer

Spanish Central: Translation of transformer

Nglish: Translation of transformer for Spanish Speakers

Britannica English: Translation of transformer for Arabic Speakers Encyclopedia article about transformer

Comments on transformer

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


to corrupt or become corrupted

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