| Acronym | Definition |
|---|
| TJA | Total Joint Arthroplasty (surgical procedure) |
| TJA | Tarija, Bolivia (Airport Code) |
| TJA | Telecommunications Journal of Australia (Telecommunications Society of Australia) |
| TJA | Thai Journalist Association |
| TJA | Théatre des Jeunes Années (French: Young People's Theater) |
| TJA | Texas Jail Association (professional group; Huntsville, TX) |
| TJA | The Jedi Assembly (Star Wars fan club) |
| TJA | Thermo Jarrell Ash Corporation (spectrometer manufacturer) |
| TJA | Trichosanthes Japonica Agglutinin |
| TJA | Taiwan Journal of Anthropology |
| TJA | Transport Jacques Auger (French; Canadian transport company) |
| TJA | Tréga'Jeunes Animations (French youth activity group) |
| TJA | Transportes João Amaral (Portuguese transport company) |
| TJA | Terminal Jog Auxiliary |