Adjective
Having both sashes hung with weights and cords; -- said of a window.
Source: Webster's dictionaryDouble-hung sash A sash window is the traditional style of window in the United Kingdom, and many other places that were formerly colonized by the UK, with two parts (sashes) that overlap slightly and slide up and down inside the frame. Source: Internet
The stately old houses with their deep porches and floor to ceiling double-hung windows are closed up, no doubt cool and serene on the inside. Source: Internet
However, double-hung windows can cost anywhere between $200 to $300 and, unless you're a DIY wizard, you will have to pay someone to install them. Source: Internet