What does PIECE mean?

noun

1. a separate part of a whole“an important piece of the evidence”
2. an item that is an instance of some type“he designed a new piece of equipment”
3. a portion of a natural object“they analyzed the river into three parts”
4. a musical work that has been created“the composition is written in four movements”
5. an instance of some kind“it was a nice piece of work”
6. an artistic or literary composition“he wrote an interesting piece on Iran”
7. a portable gun“he wore his firearm in a shoulder holster”
8. a serving that has been cut from a larger portion“a piece of pie”