a piece is a portion, part, or section of something. It generally refers to a quantity that is less than all of the whole. It is often used to refer to a distinct object or unit, and is often associated with artistic endeavors such as music or literature.
1. That painting is really composed of many individual pieces.
2. We ordered a few pieces of pizza for the group.
3. The author produced three pieces of short fiction for the anthology.
common mistakes include using 'piece' to describe a collective group of objects, as 'pieces' should be referring to smaller groups or individual objects.