a horizontal bar, usu supported by posts or attached to a wall, that serves as a barrier, e.g. across a balcony, or as a support on or from which something, e.g. a curtain, may be hung
any of a number of vertical metal or wooden posts that form a fence or; a railing
either of a pair of lengths of rolled steel forming a guide and running surface for trains or other wheeled vehicles
railways as a means of transport
always travels by rail
a horizontal structural support, e.g. in a door
(usu in pl) either of the fences on each side of a horse-racing track
an electrical conductor maintained at a constant voltage and used, e.g. on a printed circuit board, to supply a number of circuit elements with power at a fixed voltage
informal to be or become mentally unbalanced; to behave strangely
informal to be or become misguided or mistaken