TNR may refer to: TNR, the gene that encodes the protein Tenascin-R Ivato International Airport, Antananarivo, Madagascar, IATA code The New Republic, an American magazine of politics and the arts Times New Roman, a popular typeface installed on most desktop computers Train Navette Rapide, an express train service in Morocco Trap-neuter-return, a method for managing feral cats T.N.Rajarathnam Pillai (1898-1956), Indian musician