IFR (disambiguation)

Look up IFR in Wiktionary, the free dictionary.

IFR is instrument flight rules, rules for when flight by outside visual reference is not safe.

IFR may also refer to:

• Ideal Final Result, an engineering design goal
• In-flight refueling
• Institute of Food Research, an agricultural and food science research institution
• Integral Fast Reactor, a nuclear reactor design
• International Federation of Robotics
• International Fleet Review
• instantaneous wave-free ratio (iFR), a diagnostic medical test used in coronary artery stenosis assessment