A fashion show (French défilé de mode) is an event put on by a fashion designer to showcase their upcoming line of clothing and/or accessories during a fashion week. Fashion shows debut every season, particularly the spring/summer and fall/winter seasons. This is where designers seek to promote their new fashions. The four major fashion weeks in the world, collectively known as the "Big 4", are those in Paris, London, Milan, and New York. Berlin fashion week is also of global importance.

In a typical fashion show, models walk the catwalk dressed in the clothing created by the designer. Clothing is illuminated on the catwalk using lighting and special effects. The order in which each model walks out, wearing a specific outfit, is usually planned in accordance with the statement that the designer wants to make about their collection. It is then up to the audience to try to understand what the designer is trying to "say", visually deconstruct each outfit and appreciate the detail and craftsmanship of every piece.

Occasionally, fashion shows take the form of installations, where the models are static, standing or sitting in a constructed environment. A wide range of contemporary designers produce their shows as theatrical productions with elaborate sets and added elements such as live music or a technological components such as holograms or pre-recorded video backdrops.