1. wearing clothes that are too formal or elaborate for a particular occasion

Examples

• She felt overdressed in her evening gown at the casual barbecue.
• He was overdressed for the beach party in his three-piece suit.
• I’d rather be overdressed than underdressed for the interview.
• The guests were overdressed for what turned out to be a picnic.
• She worried about being overdressed in her cocktail dress.
• Everyone else wore jeans, so I felt completely overdressed.