| ATT | a specialist assigned to the staff of a diplomatic mission |
|---|---|
| ATT | a shallow and rectangular briefcase |
| ATT | associated in an exclusive sexual relationship |
| ATT | (biology) permanently attached to a substrate |
| ATT | (architecture) used of buildings joined by common sidewalls |
| ATT | fastened together |
| ATT | being joined in close association |
| ATT | the act of fastening things together |
| ATT | the act of attaching or affixing something |
| ATT | faithful support for a religion or cause or political party |
| ATT | a supplementary part or accessory |
| ATT | a connection that fastens things together |