transformer

noun

trans·​form·​er tran(t)s-ˈfȯr-mər How to pronounce transformer (audio)
Synonyms of transformernext
: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Sulfur sits upstream of copper, and copper sits upstream of every transformer, busbar, and high-voltage cable in a new data center campus. Güney Yıldız, Forbes.com, 18 May 2026 The repairs follow a transformer explosion and electrical fire last June which temporarily left both buildings without power. Justin Muszynski, Hartford Courant, 14 May 2026 National Transportation Safety Board documents showed investigators had found a loose cable in a transformer and breaker system that had been switched on by crew members before departing the Baltimore port. ABC News, 12 May 2026 OpenAI’s large language model, built atop a neural-network concept developed a few years before by Google researchers called the transformer, gained millions of global users within days, asking it for medical and relationship advice, pitch decks and poetry. Andrew R. Chow, Time, 6 May 2026 See All Example Sentences for transformer

Word History

First Known Use

1596, in the meaning defined above

Time Traveler
The first known use of transformer was in 1596

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Cite this Entry

“Transformer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/transformer. Accessed 21 May. 2026.

Kids Definition

transformer

noun
trans·​form·​er tran(t)s-ˈfȯr-mər How to pronounce transformer (audio)
: a device for changing an electric current into one of different voltage
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