1 [mass noun] a silvery-white metal, the chemical element of atomic number 50. (Symbol: Sn) British informal
, dated money: Kim’s only in it for the tin
2an airtight container made of tinplate or aluminium:Albert got out the biscuit tin British an airtight sealed container for preserving food, made of tinplate or aluminium; a can:she had opened a tin of beans the contents of a tin:how many tins of paint would it take? British an open metal container for baking food:grease a 450g loaf tin British a rectangular loaf of bread baked in an open metal container.
cover with a thin layer of tin:the copper pans are tinned inside