Fashion mostly refers to the style of clothing worn at a particular time. Clothing at its most basic is to keep us warm, but it serves many other functions. It needs to fit the customs and norms of society. Clothing needs to be accepted as more or less 'normal'. It needs, for instance, to preserve decency.Fashion can also mean a style of language or behaviour. Fashions are a kind of nonverbal communication. They communicate something, but exactly what is something of a mystery. Often what they express is membership of a particular group.Fashions are like trends. They change more quickly than the entire culture. The term 'fashion' is often used a synonym forglamour and style. Sometimes the term is used in a negative sense, to mean a 'fad'.There are fashions in many types of human activity and ways of thinking. There are fashions in architecture (the way people build houses) and interior design (the way people decorate inside their houses). There are fashions for clothing. There are fashions for dance and music, and for the way people speak. There are fashions for ideas.