English definition of “rail”
FOR HANGING [C] UK › a horizontal bar on the wall that you hang things on: a curtain rail
FOR SUPPORTING [C] › a bar around or along something which you can hold to stop you from falling: a hand rail
TRAIN SYSTEM [U] › trains as a method of transport: rail travel a rail link They sent the shipment by rail.
TRAIN [C] › the metal tracks that trains run on → See also towel rail