All articles starting with U
6,146 articles
Urban Dynamometer Driving Schedule
The Urban Dynamometer Driving Schedule (UDDS), also called LA-4 or the city test, is a standardized speed trace run on a dynamometer to measure urban fuel economy and emissions.
Urban exploration
Urban exploration (urbex, UE): recreational trespass into abandoned buildings, construction sites, sewers, and rooftops, documented by photography. Community ethics forbid damage and location disclosure; TikTok-driven growth raises safety and legal risks.
Urban fantasy
Urban fantasy: fantasy fiction subgenre placing supernatural beings and magic in real-world modern cities; emerged in the 1980s with Emma Bull, Charles de Lint, and Borderland, consolidated in the 1990s by Gaiman and Miéville; distinct from paranormal romance.
Urban flooding
Urban flooding is the inundation of land and property in built-up areas when intense rainfall, river overflow, or seawater overwhelms drainage; impermeable city surfaces speed runoff.
URBAN GROOVE FITTERS (Miton Usui, Yoshito Tanaka, Taku Nakajo, Takashi Numazawa)
URBAN GROOVE FITTERS is a Japanese funk and soul quartet of established session musicians, fronted by singer-songwriter Miton Usui with guitarist Yoshito Tanaka, bassist Taku Nakajo, and drummer Takashi Numazawa.
Urban heat island
The urban heat island is the excess warmth of a built-up city over its rural surroundings, up to 12 °C warmer on a clear, calm night.
Urban Historic Centre of Cienfuegos
The Urban Historic Centre of Cienfuegos is a UNESCO World Heritage Site, the 70-hectare historic core of Cienfuegos, Cuba, founded in 1819 by French settlers.
Urban Hospitals
Urban hospitals are hospitals located in metropolitan areas under a MeSH classification introduced in 1991; they are typically large, teach, and serve one-third of rural patients' hospital stays.
Urban Hymns
Urban Hymns is the third studio album by the English rock band the Verve, released in 1997. It topped the UK chart and features "Bitter Sweet Symphony" and "The Drugs Don't Work".
Urban landscape
An urban landscape is the features, patterns, and structure of a particular geographic portion of a city, combining built and natural surroundings with social configurations.
Urban legend
Urban legend: a short, supposedly true story about recent events spread informally person to person, often attributed to a friend of a friend; also called contemporary legend. Defined by Brunvand; term's earliest OED citation is Dorson 1968; truth is not the defining test.
Urban Legend (film)
Urban Legend (1998) is a slasher horror film directed by Jamie Blanks, written by Silvio Horta, starring Alicia Witt, Jared Leto, and Rebecca Gayheart; campus murders staged as urban legends, $38.1M US gross.
Urban Legends: Final Cut
Urban Legends: Final Cut (2000) is a horror slasher sequel to Urban Legend (1998), John Ottman's directorial debut, starring Jennifer Morrison as film student Amy Mayfield at Alpine University, where thesis-film crew members die in staged accidents; scored 16 on Metacritic.
Urban Meyer
Urban Meyer, American football coach; won 2006 and 2008 national titles at Florida and 2014 at Ohio State, 187-32 college record, fired by the Jacksonville Jaguars in 2021 after a 2-11 season.
Urban mining
Urban mining is the recovery of valuable materials from waste and built structures instead of natural ore deposits, treating e-waste, construction debris, and old vehicles as mines.
Urban novel
The urban novel (German Großstadtroman, big-city novel) is a novel in which the modern metropolis is the central subject; the genre peaked in Berlin between 1910 and 1933.
Urban Outfitters
Urban Outfitters, Inc. is an American apparel and lifestyle retailer whose portfolio includes the Urban Outfitters, Anthropologie, and Free People brands plus the Nuuly clothing-rental subscription.
Urban park systems
An urban park system is a network of parks planned and connected as one whole, a term coined by Olmsted and Vaux in 1868 for Buffalo, New York.
Urban planning
Urban planning organizes land use, infrastructure, transport, and public space for sustainable, equitable city growth. Also called city or town planning; uses zoning, comprehensive plans, and national urban policy; key issues include compact growth versus sprawl and climate resilience.
Urban plants
Urban plants are the trees, shrubs, herbs, and grasses that grow within cities and towns, planted or spontaneous, forming the living base of urban green infrastructure.
Urban Population
Urban population: people living in areas each country defines as urban, compiled by the UN World Urbanization Prospects and World Bank (1960-2025). World share 58% in 2025, heading to 68% by 2050; definitions differ by country.
Urban Prose
Urban Prose (городская проза) is a direction in Soviet Russian literature of the 1960s to 1980s focusing on the everyday life of the urban intelligentsia.
Urban rail transit in India
Urban rail transit in India, also known as metro systems in India, began with the Kolkata Metro in 1984 and serves over 10 million daily passengers.
Urban renewal
Urban renewal, also called urban regeneration or redevelopment, is a government program that acquires and clears blighted land for redevelopment, notably the US federal program of 1949 to 1974 that displaced over a million people.
Urban romance
City romance (городской романс), also called everyday romance, is a Russian urban folk song genre of the lower city classes, flourishing from the late 1800s into the 20th century.
Urban sprawl
Urban sprawl: low-density, dispersed outward growth of cities, first named in the late 1940s. Measured by density, fragmentation, and centrality; built-up land has grown twice as fast as population since 1975, driving compact-city and smart-growth policies.
Urban traffic
Urban traffic: vehicle and person flows on city street networks and their congestion. Distinguished by FHWA congestion-cause breakdown, TomTom 3.65-trillion-km index, health impacts, and congestion charging in London, Singapore, and New York.
Urban uprisings of 1648
The urban uprisings of 1648 (Городские восстания 1648 года) were a wave of town risings across the Russian state, begun by the Moscow Salt Riot of June 1648.
Urban village (城中村) (China)
Urban village (城中村, chengzhongcun, "village in the city"): rural settlements surrounded by expanding Chinese cities on collectively owned land. Dense migrant rental housing; 36.3% of Shenzhen's housing floor area; redevelopment now favors incremental renewal over demolition.
Urban warfare
Urban warfare, also called FIBUA or urban combat, is combat conducted in, around, and for cities, where buildings and dense population are the dominant battlefield features.