tinfoil

noun

tin·​foil ˈtin-ˌfȯi(-ə)l 

: 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

Feed me memes and tinfoil and old-timey film strips. — Erin Qualey, Vulture, 6 May 2026

Burned tinfoil and a baggie with methamphetamine were found in the main-level bathroom. — Nick Ferraro, Twin Cities, 26 May 2026

Edison’s version used a needle to etch sound waves on a sheet of tinfoil wrapped around a metal cylinder. — IEEE Spectrum, 6 Jan. 2026

That’s where Davis filmed the Beasties smoking… something out of a makeshift tinfoil pipe. — David Fear, Rolling Stone, 30 Jan. 2026

Word History

First Known Use

14th century, in the meaning defined above

Phrases Containing tinfoil

• put one's tinfoil hat on
• tinfoil hat
• wear a tinfoil hat

Rhymes for tinfoil

• airfoil
• benzoyl
• despoil
• embroil
• etoile
• gargoyle
• recoil
• subsoil
• topsoil
• trefoil
• turmoil
• aerofoil

Kids Definition

tinfoil

noun

tin·​foil ˈtin-ˌfȯil 

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