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Rite of passage
A rite of passage, or rites de passage, is a ritual marking a person's movement between social states, such as birth, coming of age, marriage, or death.
Rites and music system
The rites and music system (礼乐制度) was the Western Zhou order of ritual and ceremonial music that organized political rank, religion, and education, traditionally created by Zhou Gongdan.
Rites of Zhou
The Rites of Zhou (周礼) is a Confucian classic describing an idealized roster of state offices, later listed among the Thirteen Classics and used as a template for Chinese government institutions.
Ritesh Agarwal
Ritesh Agarwal is an Indian entrepreneur, founder and chief executive of OYO, the budget-hotel company he started in 2012 at age 18 with a single hotel in Gurgaon.
Ritesh Arora
Ritesh Arora is an Indian entrepreneur who co-founded BrowserStack, the cloud-based software testing platform, in Mumbai in 2011 with Nakul Aggarwal and serves as its chief executive officer.
Ritesh Banglani
Ritesh Banglani is an Indian venture capital investor who co-founded Stellaris Venture Partners in Bengaluru in 2016 after five years as a Helion Venture Partners partner, investing in TaxiForSure and Mamaearth.
Ritesh Tandon
Ritesh Tandon is an Indian-American Republican politician, engineer, and CEO of Kricel Corporation who advanced from the June 2026 primary to challenge Ro Khanna for California's 17th congressional district.
Ritsuryō system
The Ritsuryō system (律令制) was ancient Japan's centralized political order, based on ritsuryō codes adapted from Tang China and essentially completed by the Taihō Code of 701.
Ritu Khanduri Bhushan
Ritu Khanduri Bhushan is an Indian Bharatiya Janata Party politician serving as the first woman Speaker of the Uttarakhand Legislative Assembly, after winning the Kotdwar seat in 2022.
Ritu Tawde
Ritu Tawde (रितू तावडे), BJP politician and three-term Ghatkopar corporator, was elected unopposed as Mumbai's 78th mayor on 11 February 2026, the city's eighth woman mayor and the BJP's first since 1982–83.
Ritual
Ritual is a predefined sequence of rigid, formal, repeated ceremonial acts prescribed by tradition or religious decree, found in all known societies and often marking transitions between life stages.
Ritual of Embalming Papyrus
The Ritual of Embalming is the principal surviving ancient Egyptian ritual text for embalming a human body, preserved in hieratic papyrus copies of the Roman period from Thebes.
Ritual purification
Ritual purification, also called ritual cleansing or purity rite, is the religious use of rites like ablution and immersion to remove impurity, in Judaism, Islam, Shinto, and other traditions.
Ritual Reform of the Jiajing Emperor
The Ritual Reform of the Jiajing Emperor (嘉靖更定祀典) was a sweeping revision of the Ming dynasty's state sacrificial system under Emperor Jiajing, launched after the Great Rites Controversy.
Ritual washing in Judaism
Ritual washing in Judaism, also called ablution in Judaism, ranges from hand-washing to full-body immersion in a mikveh, by which Jews remove ritual impurity or mark holiness.
Rituals Cosmetics
Rituals Cosmetics is an Amsterdam-based home and body cosmetics brand founded by Raymond Cloosterman in 2000, with nearly 1,500 boutiques in 33 countries and 2025 revenue of €2.43 billion.
Riva Capital Partners
Riva Capital Partners is the family of private equity funds managed by Abrams Capital Management, a Boston-based investment firm, with David C. Abrams as managing member.
River basin management
River basin management, in its integrated form known as IRBM, governs water, land, and related resources across a whole river basin; the EU's 2000 Water Framework Directive made such plans obligatory for member states.
River Mobility
River Mobility is an Indian electric two-wheeler startup in Bengaluru, founded in 2021 by Aravind Mani and Vipin George, maker of the Indie utility scooter.
River valley civilization
River valley civilizations were early complex societies arising in the floodplains of the Tigris-Euphrates, Nile, Indus, and Yellow Rivers between about 4000 and 1500 BCE, marked by cities, surplus agriculture, writing, and social hierarchy; the older river valley theory of civilization's origins is now qualified.
Riverlane
Riverlane is a British quantum computing company founded in Cambridge in 2016 by Steve Brierley. It builds Deltaflow, a real-time quantum error correction system combining FPGA hardware and software.
Rivers of Blood speech
Enoch Powell's April 1968 Birmingham speech on Commonwealth immigration, named for its Virgil 'River Tiber foaming with much blood' allusion; it led Edward Heath to sack him from the Shadow Cabinet and shaped later UK immigration debate.
Riverside Capital Appreciation
Riverside Capital Appreciation is a series of private equity buyout funds managed by The Riverside Company, a firm founded in 1988 and based in New York and Cleveland.
Riverside City College
Riverside City College, also known as Riverside Junior College, is a public community college in Riverside, California, founded in 1916 and serving about 30,000 students annually.
Riverside Europe
Riverside Europe is the European buyout platform of The Riverside Company, a private equity firm founded in 1988, run from Luxembourg under Karsten Langer; its largest fund closed on €465 million.
Riverside Micro-Cap
Riverside Micro-Cap (RMCF) is The Riverside Company's micro-cap fund family, which buys control investments in North American companies with up to $10 million of EBITDA.
Riverside Value
Riverside Value (RVF) is the value-oriented buyout platform of The Riverside Company, making control investments in North American businesses with revenue of $60 to $300 million.
Riverton Prize
The Riverton Prize (Rivertonprisen), formally "Den gylne revolver" ("The Golden Revolver"), is an annual Norwegian award for the year's best crime fiction work, presented since 1973.
RiverVest Venture Partners
RiverVest Venture Partners is a St. Louis, Missouri venture capital firm founded in 2000 that invests in early-stage biopharmaceutical and medical device companies, with offices in San Diego and Cleveland.
Riverwood Capital
Riverwood Capital is a growth-equity investment firm founded in 2008 by Jeff Parks and Francisco Alvarez-Demalde, both formerly of KKR, and headquartered in Menlo Park, California.