NM, nm, and variations may refer to:

Businesses and organizations

  • Northwestern Mutual, financial services company in Wisconsin, United States
  • Air Madrid (IATA airline designator NM), Spanish airline
  • Mount Cook Airline (IATA airline designator NM), New Zealand airline
  • Manx2 (IATA airline designator NM), Isle of Man airline
  • Namarakieana Movement (NM), political party in Vanuatu
  • Niagara Movement

Places

  • North Macedonia, a country in the Balkans region of Europe
  • The National Mall in Washington, D.C., United States
  • Navi Mumbai, India
  • New Mexico, a state of the United States (postal abbreviation)
  • Inner Mongolia, an autonomous region of China (Guobiao abbreviation and ISO-3166-2:CN code NM)
  • Northern Mindanao, an administrative region in southern Philippines

Science and technology

Medicine

  • Nemaline myopathy, a neuromuscular disorder
  • Neuromelanin, a dark pigment found in the brain
  • Nuclear medicine, a medical imaging modality

Units of measure

  • Nanometre (nm), an SI unit of length, equal to 10<sup>−9</sup>&nbsp;m (a thousand-millionth of a metre)
  • Nanomolar (nM), in chemistry, one thousand-millionth molar
  • Nautical mile (NM or nmi), a unit of length used for maritime and aerospace purposes
  • Newton-metre (N m, may also be written as N·m), a unit of torque
  • Normal cubic metre (Nm<sup>3</sup>), a unit of volume (normal referring to standard temperature and pressure)
  • Normalizovaný muštomer (°NM), a scale of wine must density
  • Number metric, a measure of linear density of fibers in textiles

Other uses in science and technology

  • nm (Unix), a computer program used as an aid for debugging
  • NM, nonmetallic-sheathed electrical cable (in North America), nowadays typically thermoplastic-sheathed cable
  • Noise margin, the amount by which a signal exceeds the minimum amount for proper operation

Other uses

  • Never mind, or nothing much or not much in Internet slang
  • Namma Metro, a rapid transit line in Bangalore, India
  • Nao Sena Medal, a gallantry award for servicemen in the Indian Navy
  • National monument
  • National monument (United States)
  • National Master, a chess title
  • no mark, an athletics abbreviation indicating that an athlete participated in a field event but recorded no valid height, jump, or throw.