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Short definition from Wiktionary

Noun

1. 1
   Someone or something which cans.
2. 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.
3. 3
   Someone who lives off container deposit refunds from recycling.
4. 4
   An animal yielding inferior meat best suited to canning.

Proper noun

1. 1
   A surname originating as an occupation.