A tailcoat is a knee-length coat characterised by a rear section of the skirt, with the front of the skirt cut away.
Beau Brummell wears a Regency period dress coat as daytime dress. The coat is able to close and the tails are knee length.
Winfield Scott wearing a tailcoat at the Battle of Veracruz
A women's black wool tailcoat, 1939
Military issue tail coat, 1789
A suit, also called a lounge suit, business suit, dress suit, or formal suit, is a set of clothes comprising a suit jacket and trousers of identical textiles generally worn with a collared dress shirt
Tailcoat
…in the Early Modern era. From the 18th century, however, tailcoats evolved into general forms of day and evening formal wear, in parallel to how the lounge suit succeeded the frock coat (19th century) and the justacorps (18th century). Thus, in 21st-century Western dress codes for men, mainly two types of…
Actor Matt Smith wearing a tweed three-piece suit
A man dressed in a three-piece suit and bowler hat
Comparison of two notched lapel cuts: English (left) and Spanish (right). The former is the most commonly seen notched lapel.