Daabbr. daltonDA 1 (d????)n. Slang A ducktail.[Abbreviation of duck’s ass.]DA 2abbr.1. delayed action2. deposit account3. D/A digital/analog4. district attorney5. Doctor of Arts6. don’t answerAmerican 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.D/A or d.a.abbreviation for1. (Banking & Finance) deposit account2. (Commerce) commerce documents against acceptanceCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014