double-track adjective 1verb 1double track noun 1forms 3 adjective1 •Having a pair of tracks in order to allow trains to pass in opposite directions.The double-track branch curves away southwards at the south end of the station and runs on a banked down gradient gradually losing sight of the main line. — 1958 verb1 •To provide double track. double track noun1 •A section of railway line or tramline consisting of two parallel tracks, one being used in one direction and the other in the opposite direction. formsdouble-tracked · double-tracking · double-tracks