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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.


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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of trustbuster

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

Vocabulary lists containing trustbuster

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

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

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

Despite his trustbuster image, Wu argues, Roosevelt had little problem with bigness itself.

From Washington Post Dec. 27, 2018

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

From Slate Jan. 13, 2017

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