Information & Library Science

Media Studies

  • noun
    (written as IR)
    independent radio – in the UK, all non-BBC stations
  • acronym forIndependent Radio
    (written as IR)


  • acronym forindex register
    (written as IR)
  • acronym forinformation retrieval
    (written as IR)
  • acronym forinstruction register
    (written as IR)
  • noun a register in a central processing unit that stores an instruction during decoding and execution operations.


  • acronym forinstrument rating
    (written as IR)
  • noun an additional qualification added to a licence, such as PPL, allowing a pilot to fly in instrument meteorological conditions

General Science

  • chemical symbol forIridium
    (written as Ir)