An obsolete spelling of jam.
noun.
A leg.
noun.
The side or cheek of a helmet or shield.
noun.
In architecture, a side or vertical piece of any opening or aperture in a wall, such as a door, window, or chimney, which helps to bear the lintel or other member overhead serving to sustain or discharge the superincumbent weight of the wall.
noun.
In mining, a mass of mineral or stone in a quarry or pit standing upright, and more or less distinct from neighboring or adjoining parts. Also spelled jam.