Definition of tinfoil
: a paper-thin metal sheeting usually of aluminum or tin-lead alloy
Examples of tinfoil in a sentence
Wrap the leftover food in tinfoil.
First Known Use of tinfoil
TINFOIL Defined for English Language Learners
Definition of tinfoil for English Language Learners
: a thin sheet of shiny metal that is used especially for cooking or storing food
TINFOIL Defined for Kids
Definition of tinfoil for Students
: a thin metal sheeting usually of aluminum or an alloy of tin and lead
Seen and Heard
What made you want to look up tinfoil? Please tell us where you read or heard it (including the quote, if possible).