A chalet is a style of house that's mainly found in the Swiss Alps. Most chalets are made of wood and have a very wide, heavy roof that slopes down.
You might think of a chalet as a house you stay in during a ski vacation. Although chalets were originally the modest huts or cottages that Alpine herders lived in, over time the area became popular with skiers and vacationers, and chalet came to mean "mountainside holiday home." In Swiss-French, chalet means "herdsman's hut" or "Alpine cottage," from the Old French word chasel, "farmhouse."