Definition of A-frame house

An A-frame is a style of house with steeply-angled sides that meet at the top in the shape of the letter A. Although the triangle shape of the A-frame has been present throughout history, it saw a surge in its popularity around the world in the post-World War II era, roughly from the mid-1950s through the 1970s. It was during this time that the A-frame acquired its most defining characteristics.