Entry 1 sense Webster, 1913 Anarchist /ănʹər-kĭst/ · An·arch·ist · IPA /ˈæn.ɑɹ.kɪst/ 01 n. An anarch; one who advocates anarchy of aims at the overthrow of civil government. 1. An anarch; one who advocates anarchy of aims at the overthrow of civil government.