Emily Dickinson Lexicon

JAMB, n. [jam; Fr. jambe, a leg; jambes de force, a corbel or pier; It. gamba, a leg; gambo, a stem or stalk.]

1. In architecture, a supporter; the side-piece or post of a door; the side-piece of a fire-place.
2. A pillar to support the superior parts of a building. – Elmes.