BAabbr.1. Bachelor of Arts2. bankers’ acceptance3. bathroom4. batting average5. Buenos AiresBa 1The symbol for barium.Ba 2abbr. Bible BaruchAmerican Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.ba the internet domain name for (Computer Science) Bosnia-Herzegovina Ba (b??) n (Non-European Myth & Legend) Egyptian myth the soul, represented as a bird with a human headBa the chemical symbol for (Elements & Compounds) barium BA abbreviation for 1. (Education) Bachelor of Arts 2. (Art Terms) British Academy 3. (Aeronautics) British Airways 4. British Association (for the Advancement of Science) 5. (Mechanical Engineering) British Association screw thread Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Ba Chem. Symbol. barium. ba. 1. bath. 2. bathroom. B.A. 1. Bachelor of Arts. [1755?65;