Definitions

1. noun

an item of jewelry or other decoration worn on the head, especially for ceremonial or official purposes

“The queen wore a magnificent headpiece to the coronation ceremony.”

2. noun

a part or feature at the front of an object, such as a vehicle or a building

“The headpiece of the car was damaged in the accident.”

3. noun

a part of a machine or mechanism, such as a gear or a pulley, at the front or upper part

“The headpiece of the engine needed to be replaced.”