Definitions

1. noun

A small piece of metal or other material, typically shaped like a band, that is worn on the forehead, especially as part of a uniform or ceremonial headdress.

“The knight wore a frontlet with his coat of arms emblazoned on it.”

2. noun

A small, flat, usually metal piece of a helmet that is worn on the forehead.

“The armor had a frontlet to protect the soldier’s forehead.”