1. a major reorganization or restructuring, especially of a business or organization

Examples

• The company announced a major shakeup in its management team.
• After the scandal, there was a complete shakeup of the board of directors.
• The new CEO promised a shakeup of outdated policies.
• The department underwent a shakeup following poor performance reviews.
• Political shakeups often follow election defeats.
• The merger resulted in a significant shakeup of both organizations.