ND may refer to:
Arts and media nD, a fictional alien species in Invasion: Earth (TV series) Nancy Drew, a fictional teenage sleuth in various media Naughty Dog, an American video game developer Notitia Dignitatum, a late Roman administrative codex Nuclear Dawn, a 2011 video game (once a Half-Life 2 mod)
Businesses Nextdoor, a hyperlocal social networking service for neighborhoods NetDocuments, a British document management company Norsk Data, a defunct Norwegian computer manufacturer Neues Deutschland, or nd, a German daily newspaper Nederlands Dagblad, or ND, a Dutch daily newspaper
Language Nd (digraph), a digraph present in many African languages Northern Ndebele language, of Botswana and Zimbabwe (ISO 639-1:nd)
Places North Dakota, a state of the United States New Delhi, India's capital city Notre Dame (disambiguation), a number of churches and colleges Nguyen dynasty, unified Vietnamese empire (1802–1884)
Politics National Democracy (Poland), a political movement 1886–1947 National Democrats (Sweden), a far-right party 2001–2014 New Dawn (Algeria), a nationalist party formed in 2012 New Democracy (Canada), an economic reform party 1939–1940 New Democracy (Greece), a center-right party formed in 1974 New Democracy (North Macedonia), a conservative ethnic Albanian party formed in 2008 New Democrats (France), a left-wing party 2020–2022 Nuclear disarmament, the dismantlement and proposed dismantling of nuclear weapons
Science and technology Mathematics nd (elliptic function), one of Jacobi's elliptic functions
Medicine NADH dehydrogenase, an enzyme Non-distended, an abdominal distension clinical examination value Naturopathic Doctor, a degree in naturopathic medicine Notifiable disease, any disease that is required by law to be reported to government authorities
Physics ND Experiment, a particle physics experiment in Novosibirsk, Russia nD, the refractive index of a medium at a wavelength of 589.8 nm
Other uses in science and technology Neighbor Discovery, an Internet protocol Neodymium, symbol Nd, a chemical element Neutral density filter, a type of filter used in photography Contax N Digital, a digital camera ND for nominal diameter in piping ND MX-5 Miata, the fourth generation of the Mazda MX-5
Weapons and military United States Navy Diver, an occupational rating Negligent discharge, a careless use of a firearm Norrland Dragoon Regiment, of the Swedish Army Nuclear disarmament, the proposed dismantling of nuclear weapons
Other uses National Diploma (Ireland), an academic qualification in the Republic of Ireland New Dawn (disambiguation), with various meanings Neurodiversity, variation in cognition and sociability (per the social model of disability) n.d. for "no date", an abbreviation used in APA-style and other styles of bibliographic citations The NoDerivatives condition of Creative Commons licences in the International Code of Signals, denotes a tsunami warning