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 coat is typically an outer garment for the upper body, worn by any gender for warmth or fashion. Coats typically have long sleeves and are open down the front, and closing by means of buttons, zippers, hook-and-loop fasteners, toggles, a belt, or a combination of some of these. Other possible features include collars, shoulder straps, and hoods.
Man wearing a coat, painting by Julian Fałat, 1900
Overcoat (left) and topcoat (right) from The Gazette of Fashion, 1872
Justacorps, a seventeenth- and eighteenth-century knee-length coat, fitted to the waist with flared skirts
Frock coat, a kneelength men's coat of the nineteenth century