noun
- a piece forming or attached to the side of something
- a person with whom someone has a romantic or sexual relationship in addition to their main partner
Usage: slang; informal
Examples
- The carpenter attached the wooden sidepiece to complete the cabinet frame.
- She removed the damaged sidepiece from the old dresser.
- The metal sidepieces provided extra support for the structure.
- He carefully measured each sidepiece before assembly.
- The antique table had ornate carved sidepieces.