May stand for:

near infrared

northen Ireland

northen Ireland railways

national identity register

national internet registry

In Geography, NIR is the Natural Increase Rate. NIR = CBR (crude death rate) - CDR (crude death rate). Natural means that imm/emmigration are not counted.

B. G. Osborne has written:

'Practical NIR spectroscopy with applications in food and beverage analysis' -- subject(s): Analysis, Beverages, Food, Near infrared spectroscopy

The report "Global Automotive Night Vision System Market, By Technology (Far Infrared (FIR) and Near Infrared (NIR)), By Components (Night Vision Camera, Controlling Unit, Display Unit, Sensors, and Other Parts), and Region - Global Forecast to 2029"

Nir Assayag's birth name is Nir Avner Assayag.

NIR stands for Northern Ireland. Nir can be a city and county name in Iran.