XP4 Full Form. Full Meaning of XP4 Find long form and abbreviation, slang or definition of XP4. What does XP4 mean? What does XP4 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.