| Acronym | Definition |
|---|
| NIR➣Near Infrared |
| NIR➣Near-Infrared Radiation |
| NIR➣Near-Infrared Reflectance |
| NIR➣Natural Increase Rate (population) |
| NIR➣National Identity Register (UK) |
| NIR➣Near Infra Red |
| NIR➣Network Information Registry |
| NIR➣Near Infrared Response |
| NIR➣Northern Ireland Railways |
| NIR➣Net International Reserves |
| NIR➣National Inventory Report |
| NIR➣Non-Ionizing Radiation |
| NIR➣National Internet Registry |
| NIR➣Network Information Retrieval |
| NIR➣New Industrial Relations (labor strategy) |
| NIR➣National Institute of Research (various locations) |
| NIR➣New Information Request (various organizations) |
| NIR➣Name of Input Raster (computing) |
| NIR➣New Inspection Regime (port state control) |
| NIR➣National Institute of Development Research and Documentation (Botswana) |
| NIR➣Net Interest Revenue |
| NIR➣Net Irrigation Requirement |
| NIR➣Navajo Indian Reservation |
| NIR➣Nine Inch Richards (Nine Inch Nails parody band) |
| NIR➣Numéro d'Identification au Répertoire National des Personnes Physiques Numéro d'Identification au Répertoire (French: Directory Identification Number) |
| NIR➣No Individual Requirement |
| NIR➣Non-Immediate Allergic-Type Reactions |
| NIR➣New Item Request |