Longman Dictionary of Contemporary English
Wiktionary
n. 1 A job or occupation carried out at home or on a part-time basis. 2 A small-scale industry, with relatively few employees or a limited customer base or low economic impact.
WordNet
n. small-scale industry that can be carried on at home by family members using their own equipment
Wikipedia
Cottage Industry is First Mini-Album by South Korean duo Kim Heechul & Kim Jungmo ( M&D), released by SM Entertainment and distributed KT Music on April 20, 2015.
Usage examples of "cottage industry".
This was the home of a cottage industry of some sort: what kind of industry was impossible to judge from the outside.
As they got bigger, Demos brought in his most trusted tenants and it became a cottage industry, taking the bulk and weighing, measuring, and bagging it for the smaller wholesalers and the retail trade.
So an academic cottage industry is springing up, and small journals are breaking out in a Vico rash.
But this haphazard publishing cottage industry did nothing to dethrone the print incumbents and their avaricious pricing.
The idea is to have the Dimsdale women make them by hand - sort of a cottage industry.
They've got a goddamn cottage industry going here, Herbert thought, amazed.