| Acronym | Definition |
|---|
| EHAA➣Euskal Herriko Agintaritzaren Aldizkarian |
| EHAA➣Every Hand An Adventure (bridge game bidding) |
| EHAA➣EH Aviation Advisors (Switzerland) |
| EHAA➣Edmonton Homebuilt Aircraft Association (Edmonton, Alberta, Canada) |
| EHAA➣Enzymatically Hydrolyzable Amino Acid |
| EHAA➣English Harbour Arts Association (Canada) |
| EHAA➣Estimates of High Avidity Antibodies (virology) |