Complex sentence: "Poultry" can be defined as domestic fowls, including chickens, turkeys, geese and ducks, raised for the production of meat or eggs and the word is also used for the flesh of these birds used as food.
Split into simpler sentences: Poultry can be defined as domestic fowls, including chickens, turkeys, geese and ducks, raised for the production of meat or eggs. The word is also used for the flesh of these birds used as food.