halter

/ˈhɔltər/
noun
  1. A rope or strap used to lead or tie an animal, especially a horse.
    • She put a halter on the horse before leading it out of the stable.
    • The farmer checked the halter to make sure it was secure.
    • He bought a new leather halter for his pony.
  2. A type of women's top or dress that ties around the neck, leaving the shoulders and back bare.
    • The dress had a halter neckline that showed off her shoulders.
    • Halter tops are popular in summer because they are cool.
    • She wore a red halter to the beach party.