ADSS can stand for: Actes et documents du Saint Siège relatifs à la Seconde Guerre Mondiale Papal documents during the Second World War ADSS (ADS Securities), a private financial services firm headquartered in Abu Dhabi Alberni District Secondary School, a high school in British Columbia Canada All-dielectric self-supporting cable, a type of fibre optic cable used by electrical power transmission companies Adenylosuccinate synthase, an enzyme