1. （人、动物等的）围长、腰围
The girth of an object, for example a person's or an animal's body, is its width or thickness, considered as the measurement around its circumference.

2. （马的）肚带，鞍带
A girth is a leather strap which is fastened firmly around the middle of a horse to keep the saddle or load in the right place.

1. stable gear consisting of a band around a horse's belly that holds the saddle in place

Synonym: cinch

2. the distance around a person's body