monorail

/ˌmɑnəˈreɪl/

/ˈmɒnəʊreɪl/

Other forms: monorails

A monorail is similar to a train, but instead of traveling on two tracks, it uses just one. If you visit Tokyo or Disney World, you'll probably travel on a monorail.

Most monorails are elevated, with trains either moving above a single track or dangling from it, suspended by a wide rail. They generally run on electricity, which flows through the track and keeps the train moving. The earliest monorails were designed in the late 1800s, and this is also when the word developed, from mono, "one" in Greek, and rail, from the Latin regula, "straight stick."

Definitions of monorail

1. noun

   a train running on a single, elevated track or beam
   type of:

   railroad, railroad line, railway, railway line, railway system

   line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight