1. plural of horseback; the back of a horse, especially as a place to ride
Usage: usually used in the phrase 'on horseback'
2. plural of horseback; a ridge or hill shaped like a horse's back
Usage: geological or topographical usage

Examples

• The soldiers rode on horsebacks across the valley.
• Children learned to sit properly on horsebacks during riding lessons.
• The landscape featured several distinctive horsebacks formed by erosion.
• In the old days, travelers covered long distances on horsebacks.
• The riding instructor taught beginners how to balance on horsebacks.
• The geological survey identified several horsebacks in the mountain range.