noun
tinfoil
noun
1
A thin, flexible sheet of metal, often aluminium, used to wrap or cover food.
"She wrapped the leftovers in tinfoil."
How to Use Tinfoil
Learner’s notesIn plain EnglishThin metal sheeting used for wrapping food, though most modern "tinfoil" is actually aluminium.
Common mistake
What people call "tinfoil" today is almost always aluminium foil, not real tin.
Word Forms
tinfoiled past tense, tinfoils plural, tinfoils singular
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She wrapped the leftovers in _____.
Etymology
From tin + foil; originally made of actual tin before aluminium foil replaced it.