Pronunciation: (sis"tu-mat'ik),[key] —adj. 1. having, showing, or involving a system, method, or plan: a systematic course of reading; systematic efforts. 2. given to or using a system or method; methodical: a systematic person. 3. arranged in or comprising an ordered system: systematic theology. 4. concerned with classification: systematic botany. 5. pertaining to, based on, or in accordance with a system of classification: the systematic names of plants.Also,sys"tem•at'i•cal.