A U-shaped pin for fastening the hair.
More example sentences
- Spark some interest with an ornate hairpin, barrette or ponytail holder like these 24k gold-dipped pieces.
- This is a holiday hairstyle where decorative hairpins are a must!
- Women can't use hairpins to keep their hair together; it's too painful.
Definition of hairpin in:
- The US English dictionary