Derailed, of a railway carriage, etc. / Away from the proper subject; irrelevant, unrelated. / Not on right course; inaccurate.

(medicine, often attributive) A technique for intramuscular injection that uses a zigzag path.

(television) A soundtrack that is not synchronized with the visuals and may be inserted at any point, such as the background sounds of a city or jungle.

a dedicated track or path along which bicycles can be ridden

A boat towed by a line from the shore.

plural of track-boat

plural of track-road

(archaic) A towpath.

(rail transport, slang, US) A person hit by a train after jumping or falling in front of it.

(rail transport) The provision of double track, usually as a conversion from single track.