| Noun | 1. | roll-on roll-off - a method of transport (as a ferry or train or plane) that vehicles roll onto at the beginning and roll off of at the destination aeroplane, airplane, plane - an aircraft that has a fixed wing and is powered by propellers or jets; "the flight was delayed due to trouble with the airplane" transport, conveyance - something that serves as a means of transportation railroad train, train - public transport provided by a line of railway cars coupled together and drawn by a locomotive; "express trains don't stop at Princeton Junction" |