1817, as a term in philosophy; 1827 in the sense "force producing motion," from Fr. dynamique (1762), from Ger. dynamisch, introduced by Leibnitz 1691 from Gk. dynamikos "powerful," from dynamis "power," from dynasthai "be able to have power," of unknown origin. The figurative sense of "active, potent, energetic" is from 1856. Related: Dynamically.