Entry 1 sense Webster, 1913 Miasmatic · Mi·as·mat·ic · IPA /ˌmaɪəzˈmætɪk/ 01 a. Containing, or relating to, miasma; caused by miasma; as, miasmatic diseases. 1. Containing, or relating to, miasma; caused by miasma; as, miasmatic diseases.