Bandeau (noun)

A simple, strapless headband or band worn around the forehead, often as a decorative accessory or undergarment.

Origin:

From french 'bande,' meaning a strip or band.

Examples:

1. She wore a bandeau as a headband to keep her hair out of her face.
2. The bandeau was a popular accessory for beach-goers.
3. She paired the bandeau with a flowy sundress for a bohemian look.
4. The bandeau was also used as a bra for dresses with low-cut necklines.
5. She wore a beaded bandeau for a touch of sparkle in her hair.