Equine/ˈiːkwaɪn/ Definition 1 of 2Pro Tip 1/3Technical Term Used mainly by professionals like veterinarians and horse trainers, not in everyday conversation. Her research focuses on equine muscle development. Pro Tip 2/3Not Just Horses 'Equine' can refer to donkeys and zebras, as they are related to horses. Zebras are fascinating equine animals with their unique stripe patterns. Pro Tip 3/3Horse Activities Associated with activities involving horses, like racing and jumping. Equine therapy is gaining popularity as a way to help people heal.