An industrial city is defined by its society’s industrialization, not local factories.

Evidence

Second, as I am using the term, an industrial city-early or otherwise-is not necessarily a city in which heavy industry is located. It is a city, rather, that is itself located within an industrializing or industrialized social order. In this sense, San Francisco, for example, is as much an industrial city as Pittsburgh or Detroit; London-and we shall be paying a good deal of attention to London-is as much an industrial city as Birmingham or Manchester. — Lyn H. Lofland, World of Strangers_ Order and Action in…, 306

Categorization

• DEFINE: Defines ‘industrial city’ by social order context rather than industry location.
• corroborated: 2 independent passages support this claim — Lyn H. Lofland, World of Strangers_ Order and Action in…, 306