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:<code>nd</code>)

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
  • n<sub>D</sub>, the refractive index of a medium at a wavelength of 589.8&nbsp;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
  • in the International Code of Signals, denotes a tsunami warning