1. to dye (fabric or material) with too much dye or for too long, resulting in a color that is too dark or intense
2. to dye something again with a different color, especially to cover or change an existing color

Examples

• She accidentally overdyed the shirt, making it much darker than intended.
• The fabric was overdyed and came out nearly black instead of navy blue.
• You can overdye that faded dress with a deeper color to refresh it.
• The artist decided to overdye the canvas with purple to create a richer background.
• Be careful not to overdye the delicate silk material.
• They overdyed the old curtains to match the new decor.