Ernst Mach was a notable Austrian physicist and philosopher. He is the father of Mach's principle, which states that the local motion of an object is influenced by the mass and distribution of all other matter in the universe. Synonyms for Ernst Mach include Mach, Ernst, Machian, and Machism. These synonyms are commonly used in the field of physics and philosophy. In addition to his work on physics, Mach also made significant contributions to the field of psychology. Mach's ideas continue to influence the field of physics to this day, making him one of the most influential figures in the history of science.