Definition of Problematic

Adjective: problematic  ,pró-blu'ma-tik

1. Open to doubt or debate
   "If you ever get married, which seems to be extremely problematic";
   - debatable, problematical
    
2. Making great mental demands; hard to comprehend, solve or believe
   "a problematic situation at home";
   - baffling, elusive, knotty, problematical, tough

See also:
problem
problematical