canner canner /ˈkænər/

noun

1. Someone or something which cans  ( canner )
   someone or something which cans
   
2. A large pot used for processing jars when preserving food, either in a boiling water bath or by capturing steam to elevate the pressure and temperature  ( canner )
   a large pot used for processing jars when preserving food, either in a boiling water bath or by capturing steam to elevate the pressure and temperature