tinfoil

noun

tin·​foil ˈtin-ˌfȯi(-ə)l How to pronounce tinfoil (audio)
: a paper-thin metal sheeting usually of aluminum or tin-lead alloy

Examples of tinfoil in a Sentence

Wrap the leftover food in tinfoil.
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.
But all of us put the tinfoil hat on from time to time. Stepheny Price, FOXNews.com, 30 Oct. 2025 Vance Joseph builds his game plan around the reigning defensive player of the year, funneling work his way for quarterbacks who would rather eat tinfoil than throw in Surtain’s direction. Troy Renck, Denver Post, 27 Oct. 2025 The last photo in his slideshow pictured Alcaraz sitting outside with tinfoil wrapped around his head. Skyler Caruso, PEOPLE, 10 Sep. 2025 Next, place the soaked wood chips on a large piece of tinfoil. Joe Difazio, USA Today, 29 Aug. 2025 See All Example Sentences for tinfoil

Word History

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of tinfoil was in the 14th century

Browse Nearby Words

Cite this Entry

“Tinfoil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tinfoil. Accessed 7 Nov. 2025.

Kids Definition

tinfoil

noun
tin·​foil ˈtin-ˌfȯil How to pronounce tinfoil (audio)
: a thin metal sheeting usually of aluminum or an alloy of tin and lead

More from Merriam-Webster on tinfoil

Last Updated: - Updated example sentences
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