verb (used with or without object) Obsolete.
- a vertical side member of a doorframe, window frame, or lining
- a vertical inside face of an opening in a wall
side-piece of a door, window, etc., early 14c., from Old French jambe “pier, side post of a door,” originally “a leg, shank” (12c.), from Late Latin gamba “leg, (horse’s) hock” (see gambol).