English Reference
noun

mastermind

n.
US /ˈmæstɝˌmaɪnd/ UK /mˈɑːstəmˌaɪnd/ mas·ter·mind UK spelling masterminded, masterminds

  1. 01 C2 Proficiency Formal

    someone who is extremely intelligent or highly skilled in a specific area.

    a person possessing extraordinary intellectual capability or superior technical skill.

    Simple

    The young chess player was described as a mathematical mastermind.

    In context

    The university sought a creative mastermind to lead the new department of theoretical physics.

    Usage

    Usually followed by 'behind' or 'of' when linked to a specific field.

    Teacher's tip

    This sense is less common in everyday speech than the 'planner' sense; it is often used in journalism to praise high achievers.

A senior adviser to many of Latin America’s new wave of far-right leaders has been arrested for allegedly masterminding the attempted murder of his girlfriend.

The Guardian· 19 Aug 2026

In the opening day of Tupac Shakur's murder trial, prosecutors painted former gang leader Duane "Keffe D" Davis as someone seeking revenge before masterminding the drive-by shooting that killed the iconic rapper.

BBC News· 18 Aug 2026

From master + mind.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Frequent
Updated