A headband is a piece of fabric or elastic worn around the head to hold hair back, keep warm, or for fashion purposes. It typically covers the top part of the ears and sits just above the forehead.
Usage examples
I wore a headband during my yoga class to keep my hair out of my face.
She accessorized her outfit with a sparkly headband for the party.
The basketball player wore a headband to keep the sweat out of his eyes during the game.
I bought a headband with bows on it for my daughter to wear to school.
The hiker wore a headband to prevent the sweat from dripping down into his eyes on the trek.