- A band or strap which encircles the body; especially, one by which a saddle is fastened upon the back of a horse.
- 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." [Addison.]
- A small horizontal brace or girder.
Etymology: Icel. gjörð girdle, or gerð girth; akin to Goth. gaírda girdle. See Gird to girt, and cf. Girdle (n.)