“IR” can mean several different things, but the most common meanings are infrared , information retrieval , investor relations , and injured reserve in sports.

Common meanings

  • Infrared : used in science, cameras, remote controls, and sensors.
  • Information retrieval : used in search, libraries, and computer science.
  • Investor relations : the company team that communicates with investors.
  • Injured reserve : a sports roster status for injured players.

Other meanings

  • Internal revenue or Inland Revenue in tax contexts.
  • Iran in some code or abbreviation contexts.
  • Industrial relations or international relations in academic/business settings.

Text slang

In casual texting, “IR” is sometimes used to mean “in real life” , but that is less standard than the dictionary meanings above.

If you want, I can narrow it down for a specific context like text messages, school, sports, or business.