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tinfoil

[tin-foil]

noun

  1. tin, or an alloy of tin and lead, in the form of a thin sheet, much used as a wrapping for drugs, foods, tobacco, etc.



tinfoil

/ ˈɪˌɔɪ /

noun

  1. thin foil made of tin or an alloy of tin and lead

  2. thin foil made of aluminium; used for wrapping foodstuffs

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of tinfoil1

First recorded in 1425–75, tinfoil is from the late Middle English word tynfoile. See tin, foil 2
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Example Sentences

Examples have not been reviewed.

One suspect had an expensive phone wrapped in tinfoil in an attempt to block the device's signal and avoid it being traced.

From

Every weekday morning, drivers arrive at the Little Tokyo Towers at 10 a.m. carrying precious cargo: seniors’ meals individually wrapped in tinfoil.

From

The bodies of the two boys and two girls, likely born many years ago, were found in shoe boxes wrapped in tinfoil in November 2022.

From

“I said, you know, I may sound like a crazy, tinfoil hat–wearing person,” Russo, also a veterinarian, recalled at a 5 April public talk sponsored by her company.

From

“I feel like if I raise those concerns, they want to put a tinfoil hat on me and they want to say I’m an anarchist or an insurrectionist,” Crye said.

From

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When To Use

is a tinfoil hat?

Tinfoil hat is a shorthand for saying someone believes in conspiracy theories, is paranoid, or is crazy more generally.

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tin fishting