transformer

noun

trans·​form·​er tran(t)s-ˈfȯr-mər How to pronounce transformer (audio)
: 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.
For years, the power lines, poles and transformers on the aging circuit, known by the number 135-22, that serves his neighborhood, increasingly became overloaded. Ivan Penn, New York Times, 28 Sep. 2025 More than 70% of the nation’s power lines and transformers are over 25 years old with many nearing the end of their functional life. Preston Fore, Fortune, 27 Sep. 2025 More than 80% of such high-voltage transformers are made by suppliers in countries ranging from South Korea to Germany to Canada, Daniels said. Lori Ann Larocco, CNBC, 24 Sep. 2025 Siemens Energy, for example, is hiring hundreds of engineers for a new transformer plant, critical for powering these facilities. Charlotte Observer, 16 Sep. 2025 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 2 Oct. 2025.

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
Last Updated: - Updated example sentences
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