TA4 Full Form. Full Meaning of TA4 Find long form and abbreviation, slang or definition of TA4. What does TA4 mean? What does TA4 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.