trustbuster

American  

[truhst-buhs-ter] / ˈtrʌstˌbʌs tər /

noun

1. a federal official who seeks to dissolve business trusts, especially through vigorous application of antitrust regulations.

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trustbuster British  

/ ˈtrʌstˌbʌstə /

noun

1. informal a person who seeks the dissolution of corporate trusts, esp a federal official who prosecutes trusts under the antitrust laws

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Other Word Forms

• trustbusting
  noun

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Etymology

Origin of trustbuster

An Americanism dating back to 1900–05; trust + buster

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Example Sentences

See Examples For:

trustbuster

We get the kind of case brought by ex-Trump trustbuster Makan Delrahim and current California Attorney General Rob Bonta.

From The Wall Street Journal ● Aug. 28, 2026

Nominated by President Theodore Roosevelt in 1905, Landis was a Republican trustbuster in Roosevelt’s mold.

From Washington Post ● Apr. 9, 2022

Europe has led the charge with antitrust investigations and Margrethe Vestager, the region’s top trustbuster, recently vowed to take a harder line on the companies.

From New York Times ● Jul. 29, 2020

Teddy Roosevelt, the trustbuster himself, was also a eugenicist, an inconvenient fact left out by Wu.

From Salon ● Jan. 8, 2019

Some even hoped he might be a Teddy Roosevelt–style trustbuster.

From Slate ● Jan. 13, 2017

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