tinfoil

== English == === Etymology === From tin +‎ foil. === Noun === tinfoil (countable and uncountable, plural tinfoils) A thin, pliable sheet of tin or an alloy of tin and lead, used as a protective wrapping. (informal) Aluminium foil. ==== Alternative forms ==== ==== Derived terms ==== tinfoil hat tinfoily ==== Related terms ==== tin can ==== Translations ==== === Verb === tinfoil (third-person singular simple present tinfoils, present participle tinfoiling, simple past and past participle tinfoiled) (transitive) To cover in tinfoil.