n. 1. A band or strap which encircles the body; especially, one by which a saddle is fastened upon the back of a horse.
2. The measure around any object, such as a body at the waist or belly, or a box ; the circumference of anything; as, in order to be acceptable for mailing, the total of height and girth of a package must not exceed 63 inches.
He's a lusty, jolly fellow, that lives well, at least three yards in the girth.
3. A small horizontal brace or girder.
v. t. 1. To bind as with a girth.
Verb 1. girth - encircle or bind; "Trees girded the green fields"
2. girth - tie a cinch around; "cinch horses"