Posted in Engineering, Schools & Education, Security AAPU stands for Attleboro Auxiliary Police Unit (Attleboro, MA, USA) AAPU stands for airborne auxiliary power unit AAPU stands for Alumni Association of Princeton University AAPU stands for American Association of Pediatric Urology AAPU stands for Alumni Association of Panjab University (India) AAPU stands for Application Assistance Payment Unit (California)