| Acronym | Definition |
|---|
| ANTT➣Agência Nacional de Transportes Terrestres (Portuguese: National Agency for Land Transport; Brazil) |
| ANTT➣Arquivo Nacional Torre do Tombo (Portuguese: Torre do Tombo National Archive) |
| ANTT➣Average Normalized Turnaround Time |
| ANTT➣Aseptic Non-Touch Technique (healthcare practice) |
| ANTT➣Aboriginal National Theatre Trust (Australia) |
| ANTT➣Australian National Tide Tables |