A highly intelligent person, especially one who plans and directs a complex or difficult project: the mastermind of a robbery. (noun)
To direct, plan, or supervise (a project or activity). (verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "mastermind" in a sentence
"Now, more than 50 years later, the "Star Wars" mastermind is returning to the genre for an all-CG film he's producing."
"A mastermind is leaving mirrored clues about a plan to destroy the Earth amid thefts of a beryllium sphere and oscillation overthruster."
"Doesn't seem necessary at this point, the main mastermind already plead guilty in military tribunal and asked for the death penalty."