The word "piece" can have multiple meanings depending on the context:
1. As a noun:
A part or section of something, especially one that is distinct or separate: "a piece of cake," "a piece of wood."
A short length or small piece of something: "a piece of string," "a piece of paper."
A musical composition or work: "a piece of music," "a piece for the piano."
An article of furniture or a decorative object: "a piece of furniture," "a piece of art."
2. As a verb:
To break or split into pieces: "The vase shattered when it was dropped, and it needed to be pieced back together."
To put together or assemble: "She pieced together the scattered evidence to form a clear picture of what happened."
3. In sports:
A single stroke in a game, especially in golf or tennis: "He took a piece of nine on the 18th hole."
4. In a phrase:
"Piece of mind" refers to a state of tranquility or ease.
"Piece of cake" is an idiom meaning something is very easy to do.
Please provide more context if you need a more specific definition or explanation.