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mastermind

[mas-ter-mahynd, mah-ster-]
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verb (used with object)
  1. to plan and direct (a usually complex project or activity), especially skillfully: Two colonels had masterminded the revolt.
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noun
  1. a person who originates or is primarily responsible for the execution of a particular idea, project, or the like: the masterminds of company policy.
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Origin of mastermind

First recorded in 1710–20; master + mind
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for masterminding

mastermind

verb
  1. (tr) to plan and direct (a complex undertaking)he masterminded the robbery
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noun
  1. a person of great intelligence or executive talent, esp one who directs an undertaking
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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

Word Origin and History for masterminding

mastermind

n.

1720, "an outstanding intellect," from master (n.) + mind (n.). Meaning "head of a criminal enterprise" is first attested 1872. As a verb from 1940. Related: Masterminded; masterminding.

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Online Etymology Dictionary, © 2010 Douglas Harper