one who seeks to break up trusts. Trusts are corporate monopolies organized under a trusteeship for the sole purpose of eliminating compitition in the market place. This was used as a nickname for Theodore Roosevelt because he was the first president to break up trusts. He invented a sort of gentlemen's agreement with the trusts. He would notify any company if he thought their actions were illegal then he would give them time to change while looking at their records. If they did not change, then he would bring them to court.
While Taft broke up more trusts than Roosevelt, Roosevelt was the first trust buster.