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

Example Sentences

Wrap the leftover food in tinfoil.
Recent Examples on the Web At their feet, people smoked fentanyl off tinfoil while others nodded off. Heather Knight, San Francisco Chronicle, 14 Jan. 2023 Two teenagers were burning something that looked like tinfoil in the back of the bus. Eli Saslow, Anchorage Daily News, 7 June 2022 Two teenagers were burning something that looked like tinfoil in the back of the bus. Eli Saslow, Washington Post, 6 June 2022 The tinfoil-hat crowd has seized on Alexandra Pelosi’s presence as somehow proving the whole thing — the desecration of the Capitol, the assault on democracy — was staged. Los Angeles Times, 12 Dec. 2022 Film Gala wearing what can be described as tinfoil couture. Abby Dupes, Seventeen, 7 Nov. 2022 Glick suggests packing hoagie rolls to make sandwiches for the next morning along with some tinfoil for easy wrapping. Krista Simmons, Sunset Magazine, 17 Nov. 2022 The old friend went to his car and brought out a black container that had tinfoil and white powder. cleveland, 18 Sep. 2022 In the end, many of its low-income residents were left without air conditioners during Portland’s hottest week of the year thus far, with many trying to cope by taking cold showers or taping tinfoil to their windows to reflect the sun. oregonlive, 31 July 2022 See More

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.

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

Dictionary Entries Near tinfoil

Cite this Entry

“Tinfoil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tinfoil. Accessed 26 Jan. 2023.

Kids Definition


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

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