Definition of systematic adjective from the Oxford Advanced Learner's Dictionary

 

systematic

 adjective
adjective
BrE BrE//ˌsɪstəˈmætɪk//
 
; NAmE NAmE//ˌsɪstəˈmætɪk//
 
 
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done according to a system or plan, in a thorough, efficient or determined way a systematic approach to solving the problem a systematic attempt to destroy the organization The prisoner was subjected to systematic torture. the systematic analysis of the risks involved opposite unsystematic Word Origin early 18th cent.: from French systématique, via late Latin from late Greek sustēmatikos, from sustēma, from sun- ‘with’ + histanai ‘set up’.Extra examples No systematic analysis has ever been carried out in this area. None of the studies were sufficiently systematic to give a reliable result. She was thorough and systematic in her acquisition of the collection. This was a systematic attempt to infiltrate a democratic organization. You need to try a more systematic approach to the problem.
See the Oxford Advanced American Dictionary entry: systematic