1. an abnormal inward curvature of the spine, especially in the lower back
Usage: medical
2. a horse or other animal having an abnormally curved back that dips downward

1. having an abnormally curved back that dips inward

Examples

• The old horse had developed a pronounced swayback from years of heavy work.
• The doctor diagnosed the patient with swayback and recommended physical therapy.
• The swayback mare could still carry light riders despite her condition.
• Poor posture can sometimes lead to swayback in humans.
• The veterinarian examined the swayback pony carefully.
• Strengthening exercises can help prevent swayback in some cases.