The acronym HMR may mean: Hazardous materials regulations The IATA-code for Hamar Airport, Norway Historisch Museum Rotterdam Hmar language, a language of India; SIL International language code HMR Hoboken Manufacturers Railroad Holy Modal Rounders Hoechst Marion Roussel, now Novartis Hydrometeorological Report Hornady Magnum Rimfire, a .17 caliber bullet Housing Market Renewal Initiative (UK)HMR