せびろ背広sebiro
1.

A type of attire typically worn by men for formal or professional occasions, consisting of a matching jacket and trousers, often referred to as a suit.

2.

Traditional male clothing that may originally include a coordinated waistcoat but is commonly worn without it, characterized by a single or double-breasted jacket style.

3.

An outfit designed for regular use by men, commonly known as a business suit, that has European origins possibly linked to civil attire or a specific tailoring district in London.

Example:

私は新しい背広を買った。