| Acronym | Definition |
|---|
| AASI | American Association of Snowboard Instructors (affliated with Professional Ski Instructors of America) |
| AASI | Abel Assessment for Sexual Interest |
| AASI | Astronomical Association of Southern Illinois |
| AASI | Advanced Aerodynamics and Structures, Inc. (aircraft manufacturer; Long Beach, CA) |
| AASI | Ambulatory Arterial Stiffness Index (blood pressure) |
| AASI | Associate of the Ambulance Service Institute (UK) |
| AASI | Automobile Association of South India |
| AASI | Adopt-a-School Initiative (Wake County Public School System; North Carolina) |
