1 Single piece of wood or metal, of any shape in section, placed horizontally, like the rail of a gate, to form an obstruction, or latch-bar dropped into a mortise behind a door or shutter to fasten it shut.
2 Horizontal timber ledge fixed to the back of a barred or ledged door to which the door-finish and hinges are fixed.
3 Gateway or gatehouse (such as the Micklegate, York), a barrier, or a toll-gate (toll-bar) on a highway.
4 Enclosure or barrier in a court of justice marking off the precinct of a judge's seat, at which prisoners are stationed for arraignment, trial, and sentence, or a particular court of law, or a barrier separating the seats of the benchers or readers from the rest of a hall, to which students were ‘called’ from the body of the hall (hence barristers ‘called to the bar’).
5 Barrier or counter over which drink (or food) is served in an inn, hotel, etc., or the room in which it is installed.
6 Pieces of timber forming the horizontal and vertical glazed divisions of a sash in a window, called bar of a sash, glazing-, sash-, or window-bar. The upright at the junction of two planes of a canted bay-window is called the angle-bar.
7 Flowing patterns in Gothic tracery, all the stonework having moulded sections the same as the mullions from which they rise, create bar-tracery, because the patterns are similar to those capable of being formed using wrought-iron bars.