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Definitions

mastermind

[mas-ter-mahynd, mah-ster-] / ˈmæs tərˌmaɪnd, ˈmɑ stər- /
VERB
plan and direct
Synonyms
STRONGEST
STRONG
WEAK


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.

“Now, with French authorities and the U.S. Department of Justice identifying Dmitry Klyuev as the mastermind, we finally see a trial against the key perpetrator of the $230 million fraud uncovered by Sergei Magnitsky.”

From Barron's • Mar. 31, 2026

"He was a mastermind criminal and highly manipulative," she said.

From BBC • Feb. 11, 2026

His reputation as a mastermind on the defense certainly precedes him, and at USC, that’s where he’ll be needed most.

From Los Angeles Times • Jan. 28, 2026

Burkina Faso's former transitional president and the alleged mastermind behind various coup plots in the country was arrested in neighbouring Togo and expelled, sources close to the case said Monday.

From Barron's • Jan. 19, 2026

If Zeitoun was transferred to a secret prison, their lives would be reversed completely: they would go from the well-off children of a successful man to the disgraced children of a presumptive sleeper-cell mastermind.

From "Zeitoun" by Dave Eggers