Jisho

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Noun, Suru verb, Intransitive verb
1. full dress; formal dress; uniform
Wikipedia definition
2. Formal wearFormal wear (US, Canada) and formal dress (UK, Australia, New Zealand, and other Commonwealth Realms) are the general terms for clothing suitable for formal social events, such as a wedding, formal garden party or dinner, débutante cotillion, dance, or race. The Western style of formal evening dress, characterized by black and white garments, has spread through many countries; it is almost always the standard formal social dress in countries without a formal national costume.
Read “Formal wear” on English Wikipedia
Read “正装” on Japanese Wikipedia
Read “Formal wear” on DBpedia

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