1. parts that form or are attached to the sides of something
2. the parts of eyeglasses that extend over the ears

Examples

• The wooden chair had ornate sidepieces carved with floral designs.
• She adjusted the sidepieces of her glasses for a better fit.
• The cabinet’s sidepieces were made from a different wood than the front panel.
• His new glasses had flexible sidepieces that bent without breaking.
• The antique mirror featured decorative sidepieces with gold leaf.
• The optician replaced the broken sidepieces on her prescription glasses.