Definition of canners:
(n) :
Someone or something which cans.
(n) :
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.
(n) :
(US, slang) Someone who lives off container deposit refunds from recycling.
(n) :
An animal yielding inferior meat best suited to canning.
(n) :
A surname originating as an occupation.