NIR

The three-letter acronym NIR may stand for:

• Near Infrared, infrared radiation of a wave length near that of red
• Northern Ireland, a region of the United Kingdom
• Northern Ireland Railways
• National Identity Register
• National Internet Registry
• Nir, Ardabil, a city in Ardabil Province, Iran
• Nir, Yazd, a city in Yazd Province, Iran
• Nir County, a county in Ardabil Province, Iran
• Nir District, a district in Yazd Province, Iran
• Nir, a Hebrew word meaning "a plowed field", also a common Hebrew first name and surname
• Natural Increase Rate, a demographic metric of population increase.

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