Other forms: monorails
A monorail is a train that runs along a single raised beam. Ride the monorail, an airport monorail, the monorail station.
It cannot switch tracks easily, which is the practical reason so few cities build networks of them — they suit shuttles between fixed points, which is why airports and theme parks use them. Tokyo's has run since 1964. Note that mono- means one, so a monorail is a one-rail line.
1nounmonorailA train running along a single raised beam.
“A monorail carries passengers from the airport to the city centre.”
monorail is a railway.
French monorail is mono, one, plus rail. The Greek monos means alone or single.
French
monorail
English, today
monorail
Borrowed from French monorail, equivalent to mono + rail.
Etymology from Wiktionary, CC BY-SA