Emily Dickinson Lexicon

GIRT, or GIRTH, n.

1. The band or stop by which a saddle or any burden on a horse's back is made fast, by passing under his belly.
2. A circular bandage. Wiseman.
3. The compass measured by a girth or inclosing bandage. He's a lusty, jolly fellow, that lives well, at least three yards in the girth. Addison.