mastermind

1 of 2

noun

mas·​ter·​mind ˈma-stər-ˌmīnd How to pronounce mastermind (audio)
ˌmas-tər-ˈ
: a person who supplies the directing or creative intelligence for a project

mastermind

2 of 2

verb

masterminded; masterminding; masterminds

transitive verb

: to be the mastermind of

Examples of mastermind in a Sentence

Noun the mastermind behind the terrorist plot the real mastermind behind the embezzlement scheme Verb They masterminded a unique solution to the problem. He masterminded the bank robbery.
Recent Examples on the Web
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Noun
Mahomes gave context behind his mastermind move during the post-game press conference, and poked fun at his acting skills at the same time. Skyler Caruso, PEOPLE, 20 Oct. 2025 And Scott Sartiano, the mastermind behind Zero Bond, is bringing both his members’ club and Sartiano’s Italian Steakhouse to the Wynn. Tori Latham, Robb Report, 19 Oct. 2025
Verb
In any case, Grace, Hal, and the White House Chief of Staff Billie Appiah (Nana Mensah) go back and forth about how to deal with the impending leak that Grace Penn masterminded the bombing of the ship. Trish Deitch, Variety, 17 Oct. 2025 When Hamilton refused him legal help, Reynolds told all who would listen that the Treasury secretary had masterminded his financial chicanery. Jane Kamensky, The Atlantic, 10 Oct. 2025 See All Example Sentences for mastermind

Word History

First Known Use

Noun

1872, in the meaning defined above

Verb

1927, in the meaning defined above

Time Traveler
The first known use of mastermind was in 1872

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Cite this Entry

“Mastermind.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mastermind. Accessed 23 Oct. 2025.

Kids Definition

mastermind

noun
mas·​ter·​mind
ˈmas-tər-ˌmīnd,
ˌmas-tər-ˈmīnd
: a person who invents or directs a project
mastermind verb

More from Merriam-Webster on mastermind

Last Updated: - Updated example sentences
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