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• brain trust
  brain trust

  noun

  a group of experts from various fields who serve as unofficial consultants on matters of policy and strategy.
• brain-trust
  brain-trust

  verb (used with object)

  to serve as a brain trust or a brain truster for.

brain trust

¹ American  

British, Brains Trust

noun

1. a group of experts from various fields who serve as unofficial consultants on matters of policy and strategy.

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brain-trust ² American  

[breyn-truhst] / ˈbreɪnˌtrʌst /

verb (used with object)

1. to serve as a brain trust or a brain truster for.

   They have brain-trusted many major corporations.

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brain trust ¹ Cultural  

1. A group of experts who serve as advisers to a government or an organization: “Before being appointed to the cabinet, Brown had been a leading figure in a financial brain trust.”

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brain trust ² Cultural  

1. A group of intellectuals and planners who act as advisers, especially to a government. The phrase is particularly associated with the presidency of Franklin D. Roosevelt.

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brain trust Idioms  

1. A group of experts who serve as unofficial but vital advisers. For example, Each town manager seemed to have his or her own brain trust, which of course changed with every election. This term, closely associated with President Franklin Roosevelt's advisers on domestic and foreign policy in the early 1930s, was first recorded in 1910.

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Etymology

Origin of brain trust

An Americanism dating back to 1905–10

Example Sentences

See Examples For:

brain trust brain-trust

Alcaraz was in constant conversation with the tennis brain trust in his coaching box, which includes former French Open champion Juan Carlos Ferrero.

From The Wall Street Journal ● Sep. 7, 2025

Rexford Tugwell, Felix Frankfurter, Adolf Berle—acolytes of the brain trust that encircled the president—were plucked from schools like Columbia and Harvard.

From Slate ● Mar. 17, 2025

It does not appear that Roberts’ Rules were followed, as the Dodgers’ brain trust allowed Jack Flaherty to give up eight runs in only three innings.

From Los Angeles Times ● Oct. 19, 2024

“There’s like a brain trust over there that he cultivates.”

From New York Times ● Jun. 15, 2024

But being sent to sit with the brain trust located on the second floor of the building meant getting a close look at one of the most important and powerful groups at the laboratory.

From "Hidden Figures" by Margot Lee Shetterly

His middle finger pointed at the NFL’s contractual model, as much as the Seattle brain-trust.

From The Guardian ● Oct. 1, 2018

The rejection forced the Jets’ brain-trust to opt for the youth route, selecting Sam Darnold in the first-round of the draft.

From The Guardian ● Sep. 12, 2018

“This is my fault, and I’m devastated by the pain and suffering that I’ve caused,” Petraeus told Peter Mansoor, one of his old brain-trust colonels.

From Time ● Nov. 15, 2012

It's a different year, different brain-trust, different player.

From Seattle Times ● May 30, 2012

He had a team starting off with Aristotle for a brain-trust, and Parmenion, one of the greatest generals of all time for his right-hand man.

From Border, Breed Nor Birth by Mack Reynolds