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.
Preparations for heat waves include reviews of circuit loading, maintenance of generators to deploy, as well as plans for transformer failure and transporting key replacement equipment where needed. Adriana Pérez, Chicago Tribune, 6 July 2025 The county parks department will close six of its regional parks — Castaic Lake, Frank G. Bonelli (already temporarily closed because of a high-voltage transformer failure on May 5), Kenneth Hahn, Peter F. Schabarum, Santa Fe Dam and Whittier Narrows — on Mondays and Tuesdays. Jaclyn Cosgrove, Los Angeles Times, 26 June 2025 Shortages of transformer equipment — which step voltages up and down across the U.S. grid — pose another obstacle, Cembalest wrote. Greg Iacurci, CNBC, 21 June 2025 The transformer fire was under control by 11:46 a.m., an FDNY spokesman said. Evan Simko-Bednarski, New York Daily News, 10 June 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 21 Jul. 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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