- 1[uncountable] (symbol Sn) a chemical element. Tin is a soft silver-white metal that is often mixed with other metals or used to cover them to prevent them from rusting a tin mine a tin box
- 2[countable] a metal container with a lid used for keeping food in a cake/cookie tin Idioms
very nervous She was like a cat on a hot tin roof before her driving test.
Check pronunciation: tin