A person who opposes trusts or monopolies, or someone who supports antitrust laws that prevent unfair business practices.
From anti- (against) + trust (a large business monopoly) + -er (one who does). This term emerged in early 20th-century American politics when monopolies dominated industries.
The antitrusters of the 1900s were like the tech regulators of today—fighting powerful companies that controlled entire industries, proving that every era has its monopoly battles.
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