title: IFR (disambiguation)
text: # IFR (disambiguation)
  
  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
  