tower block

A newer high-rise tower in downtown New Brunswick, New Jersey, U.S., known as the Hub City. High-rise towers often anchor central business districts. High-rise towers in Vilnius Central Business District, Lithuania The Majakka high-rise building in Kalasatama, Helsinki, Finland

A tower block, high-rise, apartment tower, residential tower, apartment block, block of flats, or office tower is a tall building, as opposed to a low-rise building; it is defined differently in terms of height depending on the jurisdiction. It is used as a residential or office building, or has other functions, including hotel, retail, or with multiple purposes combined. Residential high-rise buildings are also known in some varieties of English, such as British English, as tower blocks and may be referred to as MDUs, standing for multi-dwelling units. A very tall high-rise building is referred to as a skyscraper.