A "trouser suit" refers to a matching set of clothing typically consisting of a pair of trousers and a jacket or blazer. It is a versatile and stylish ensemble that combines the formal elements of a suit with the comfort and flexibility of pants. The trousers are designed to fit well and provide ease of movement, while the jacket adds structure and polish to the overall look. This classic attire is often chosen for professional or formal occasions, offering a sophisticated and put-together appearance.