XS4ALL Full Form. Full Meaning of XS4ALL Find long form and abbreviation, slang or definition of XS4ALL. What does XS4ALL mean? What does XS4ALL stand for? We are providing world largest and most comprehensive acronyms, names, abbreviations database directory on the Internet. Our data base contains more than 8,00,000 terms abbreviations and acronyms. You can also search unique terms more than 4,00,000 general Comprehensive words.