A butler is a person who works in a house serving and is a domestic worker in a large household. In great houses, the household is sometimes divided into departments with the butler in charge of the dining room, wine cellar, and pantry. Some also have charge of the entire parlour floor and housekeepers caring for the entire house and its appearance. A butler is usually male and in charge of male servants while a housekeeper is usually a woman and in charge of female servants. Traditionally, male servants were better paid and of higher status than female servants. The butler, as the senior male servant, has the highest servant status. He can also sometimes function as a chauffeur.

A great house is a large house or mansion with luxurious appointments and great retinues of indoor and outdoor staff. The term is used mainly historically, especially of properties at the turn of the 20th century, i.e., the late Victorian or Edwardian era in the United Kingdom and the Gilded Age in the United States.