1. without a halter; not wearing or fitted with a halter
Usage: chiefly used in reference to horses or other animals
2. without restraint or control; unrestrained
Usage: archaic or literary

Examples

• The haltless horse galloped freely across the meadow.
• She preferred to ride her haltless pony bareback through the fields.
• The haltless colt ran wild without any tack or equipment.
• In a haltless state, the animal moved with complete freedom.
• The rider released the haltless donkey to graze unattended.