'套装' (tào zhuāng) literally combines '套' (tào), meaning 'set' or 'complete set', and '装' (zhuāng), meaning 'clothing' or 'outfit'. Together, it refers to a coordinated set of garments designed to be worn together — most commonly a matching suit (jacket + trousers/skirt), but also extending to coordinated sets like a sweater-and-skirt combo, matching loungewear, or even themed costume sets. Unlike generic terms for clothing, 套装 emphasizes intentional coordination in color, fabric, and style.

This word is widely used in fashion retail, formal wear contexts, and daily conversation when describing polished or purposefully matched outfits. It carries a neutral-to-formal register and implies intentionality — you wouldn’t call randomly selected clothes a 套装. It’s common in shopping apps, store signage ('女士套装'), and personal descriptions ('我今天穿了一套深蓝色套装'). While often associated with Western-style suits, it applies equally to traditional or modern Chinese-designed matching ensembles.