1. prepared more thoroughly or extensively than necessary; having done more preparation than required
Usage: informal; often implies excessive or unnecessary effort

Examples

• She felt overprepared for the quiz after studying for three hours.
• The team was overprepared for the match, having practiced every possible scenario.
• He brought overprepared notes to the meeting, filling five binders with information.
• Some students worry about being overprepared, but it rarely hurts performance.
• The presentation seemed overprepared with too many backup slides.
• She was overprepared for the interview, having researched the company extensively.