54UD Full Form. Full Meaning of 54UD Find long form and abbreviation, slang or definition of 54UD. What does 54UD mean? What does 54UD 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.