That which girds, encircles, or encloses; a circumference

A belt or elasticated corset; especially, a belt, sash, or article of dress encircling the body usually at the waist, often used to support stockings or hosiery.

The zodiac; also, the equator.

To gird, encircle, or constrain by such means.

To kill or stunt a tree by removing or inverting a ring of bark.