Half-mast (British, Canadian and Australian English) or half-staff (American English) refers to a flag flying below the summit of a ship mast, a pole on land, or a pole on a building. In many countries this is seen as a symbol of respect, mourning, distress, or, in some cases, a salute. Most English-speaking countries use the term half-mast in all instances. In the United States, this refers officially only to flags flown on ships, with half-staff used on land.