IFR is instrument flight rules, rules for when flight by outside visual reference is not safe.
IFR may also refer to:
- Infection fatality rate in epidemiology
- 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 Financing Review, a financial magazine
- International Fleet Review, various publications of the same name
- Instantaneous wave-free ratio (iFR), a diagnostic medical test used in coronary artery stenosis assessment
- Immortals Fenyx Rising, a 2020 video game
- Infield fly rule, a rule in baseball that treats certain balls as caught regardless of outcome
This disambiguation page lists articles associated with the title IFR.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: