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brain truster

American  

noun

  1. a member of a brain trust; an important but usually unofficial adviser.

Etymology

Origin of brain truster

First recorded in 1930–35; brain trust + -er 1

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.

More influential than any brain truster of Franklin Roosevelt, Colonel House never held an elective office.

From Time Magazine Archive

Said Walter Reuther, the auto workers' brain truster: full production, full employment and full distribution depend on keeping wages at their present level.

From Time Magazine Archive

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.