tin·​foil | \ ˈtin-ˌfȯi(-ə)l How to pronounce tinfoil (audio) \

Definition of tinfoil

: 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

Even then, there comes the matter of trusting the regulator, but that seems preferable to burning down the last 20 years of tech and starting over with a tinfoil hat. Eric Limer, Popular Mechanics, "Tech Companies Shouldn't Make Us Trust Them, At All," 11 Jan. 2019 Put tinfoil hat base on a baking sheet lined with parchment paper. Julia Sherman, New York Times, "A Cookbook of Artists’ Creative Summer Desserts," 22 June 2018 It’s more about just sort of limiting the attack surface, as opposed to deciding to just cover everything in tinfoil. Eric Johnson, Recode, "Your phone is not secretly spying on your conversations. It doesn’t need to.," 20 July 2018 An orange candy wrapped in tinfoil and left in a car for most of an afternoon. Caity Weaver, GQ, "A Review of the Delirious New Diet Coke Flavors," 23 Jan. 2018 These were the dark days of telephone booths (and long distance charges), rabbit-ear TV antennas wrapped with tinfoil to enhance reception, and cameras with flashcubes perched on top. Southern Living, "6 Places Southerners Went to Be "In the Know" Before Facebook," 2 July 2018 When the crane comes from the oven, peel off the tinfoil and the feathered skin. John Schandelmeier, Anchorage Daily News, "Sandhill cranes make their annual short and noisy Interior Alaska stopover," 7 May 2018 Officers asked to search the vehicle and found several syringes with fluid in them and tinfoil with a powdery substance, police said. Alexandra Kukulka, chicagotribune.com, "Police: Cash drawer stolen from Northbrook salon," 1 May 2018 Everybody out there who's got issues, everybody who has got their tinfoil hat on that the white helmets did it, and Russia said the British did the chemical attack. Fox News, "What does the US accomplish by striking Syria?," 13 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tinfoil.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of tinfoil

14th century, in the meaning defined above

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Dictionary Entries near tinfoil



tin fish





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Time Traveler for tinfoil

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

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English Language Learners Definition of tinfoil

: a thin sheet of shiny metal that is used especially for cooking or storing food


tin·​foil | \ ˈtin-ˌfȯil How to pronounce tinfoil (audio) \

Kids Definition of tinfoil

: a thin metal sheeting usually of aluminum or an alloy of tin and lead

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More from Merriam-Webster on tinfoil

Rhyming Dictionary: Words that rhyme with tinfoil

Spanish Central: Translation of tinfoil

Nglish: Translation of tinfoil for Spanish Speakers

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