- The definition of a jamb is the framing that makes the side of a door or window.
An example of a jamb is the part of a door that a bolt goes into when a door is locked.
A white door jamb.
jamb definition by Webster's New World
- a side post or piece of a framed opening, as for a door, window, or fireplace
- a pillar of ore
Origin: Middle English jambe ; from Old French a leg, shank, pier, side post of a door: see gamb
jamb definition by American Heritage Dictionary
- One of a pair of vertical posts or pieces that together form the sides of a door, window frame, or fireplace, for example.
- A projecting mass or columnar part.
Origin: Middle English jambe, from Old French, leg, jamb, from Late Latin gamba, horse's hock, leg; see gambol.