WordNet (r) 3.0 (2006):

DBA
    n 1: (law) a name under which a corporation conducts business
         that is not the legal name of the corporation as shown in
         its articles of incorporation [syn: assumed name,
         fictitious name, Doing Business As, DBA]

The Free On-line Dictionary of Computing (19 January 2023):

database administrator
DBA

    A person responsible for the design and management of
   one or more databases and for the evaluation, selection and
   implementation of database management systems.  In smaller
   organisations, the data administrator and database
   administrator are often one in the same; however, when they
   are different, the database administrator's function is more
   technical.  The database administrator would implement the
   database software that meets the requirements outlined by the
   organisation's data administrator and systems analysts.

   Tasks might include controling an organisation's data
   resources, using data dictionary software to ensure data
   integrity and security, recovering corrupted data and
   eliminating data redundancy and uses tuning tools to improve
   database performance.

   (2004-03-11)