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.
Megapacks are used for business and utility-scale developments, and Tesla’s newer Megablocks are a combination of four Megapacks around one transformer. Lora Kolodny, CNBC, 29 Jan. 2026 Efficient algorithms cannot bypass the need for copper, transformers, and baseload power. Jon Markman, Forbes.com, 27 Jan. 2026 The operators likely see green lights and stable voltage readings on their screens even as transformers are overloading and breakers are tripping in the physical world. Saman Zonouz, The Conversation, 22 Jan. 2026 President Carla Peterman said the utility doubled the capacity of its Santa Teresa substation, including the installation of a new transformer and circuits. Devan Patel, Mercury News, 21 Jan. 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 7 Feb. 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
Last Updated: - Updated example sentences
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