Frock coat

A frock coat was an article of clothing.

The First Doctor wore an Edwardian frock coat. (COMIC: Moon Landing, PROSE: Sanctuary)

During his retirement to the Victorian era, the Eleventh Doctor wore a battered felt top hat, a burgundy frock coat, a waistcoat with collars and a pocket watch with a fob chain. (TV: The Great Detective, The Snowmen)