1. to open or undo the seams of something
2. to split or tear open along a line of weakness

Examples

• She carefully unseams the old dress to use the fabric for a new project.
• The tailor unseams the jacket sleeve to make alterations.
• Heavy use unseams the backpack along the bottom edge.
• The force of the impact unseams the airbag.
• Time and weather unseams the tent at its weakest points.
• He unseams the pillow to replace the stuffing inside.