| Acronym | Definition |
|---|
| WAI | Web Accessibility Initiative (W3C) |
| WAI | Who Am I? |
| WAI | Where Am I? |
| WAI | Women in Aviation, International |
| WAI | What an Idiot |
| WAI | Wide Area Information |
| WAI | Wait for Interrupt |
| WAI | Web Accessibility Initiative |
| WAI | William Angliss Institute (Australia) |
| WAI | Weidlinger Associates, Inc. (various locations) |
| WAI | Wales Arts International (UK) |
| WAI | Wetherill Associates, Inc. (Exton, PA) |
| WAI | War Against Indiscipline (Nigeria) |
| WAI | Warm Air Intake |
| WAI | Web Application Interface |
| WAI | Water to Air Intercooler (engines) |
| WAI | Works As Intended |
| WAI | Wing Anti-Ice |
| WAI | Weeks After Inoculation |
| WAI | Weekly Accident Indemnity |
| WAI | Workshop Anatomy for the Internet (Johannes Gutenberg University, Mainz, Germany) |
| WAI | Weeks After Incubation |
| WAI | Westcor Aviation, Inc. (est. 1982) |