Source : WordNet®

TIA
     n : brief episode in which the brain gets insufficient blood
         supply; symptoms depend on the site of the blockage [syn:
          {transient ischemic attack}]

Source : Free On-Line Dictionary of Computing

TIA
     
        1.  Thanks in advance.
     
        2.  {Telecommunications Industry Association}.
     
        3.  The {Internet Adapter}.
     
        4.  {Television Interface Adaptor}.
     
        (1999-12-06)