SLICE

• slice [countable]
• 1 a thin flat piece of food cut from a larger piece
• slice of
• a slice of bread
• pizza slices
• thin/thick slice
• a thin slice of ham
•  Cut the tomatoes into slices.
• 2 a part or share of something
• slice of
• Everybody wants a slice of the profits.
• 3

  fish slice

  British English a kitchen tool used for lifting and serving pieces of food [= spatula American English]
• 4 a way of hitting the ball in sports such as tennis or golf, that makes the ball go to one side with a spinning movement, rather than straight ahead
• 5

  a slice of life

   a film, play, or book which shows life as it really is

Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.