To cut something into thin, flat pieces.
Sliced food is often used in sandwiches or salads.
Examples:
She sliced the bread for the sandwiches.
I sliced the apple into pieces.
He sliced the cheese very thin.
The cat sliced the cake with its claws!
She sliced the mountain into tiny pieces with a big knife.
I sliced the water into pieces and put them in my drink.