A piece

an amount of something that has been cut or separated from the rest of it

- a piece of cake – very easy to do

- give smb a piece of your mind – to speak very angrily with smb who has done smth wrong

- (all) in one piece  

-a piece of advice/information/news

- Isn't that a piece of luck?

-a piece of art/music/poetry, etc.

- a five-cent piece

Phrases with piece

• swelling under the skin, sometimes a sign of serious illness

- a lump of coal/cheese/wood

• sth hard or solid, usually without a particular shape

A lump

A slice

• a thin flat piece of food that has been cut off a larger piece

a slice of bread, cheese, lemon