› [U] the business that involves producing and selling new styles, especially of clothes, shoes, hair, etc.: The film makes fun of major figures in the fashion industry. a fashion magazine The fashion retailer announced a drop in YTD profits of 57%. › [C or U] something that is popular at a particular time: The fashion for outsourcing has led to a shortage of home-grown workers with good IT skills. Social networking sites seem to be going out of fashion. Growing your own fruit and veg is now back in fashion.