a vehicle that is powered by electricity and moves on rails in a street, used for transporting passengers
a system or method for carrying people or goods from one place to another by cars, trains, etc.
(of a train) to travel along a track on wheels, carrying passengers or goods
a pair of metal bars that trains use to move
frequently found, happening, or seen
to make something smaller in amount, degree, price, etc.
the coming and going of cars, airplanes, people, etc. in an area at a particular time
relating to, produced by, or using electricity
pulled or powered by a horse or horses
the natural world around us where people, animals, and plants live
to cause or bring about something
a change in water, air, etc. that makes it harmful or dangerous
a system that controls the temperature and humidity in a house, car, etc.
(of a system or machine) achieving maximum productivity without wasting much time, effort, or money
a source of power used for lighting, heating, and operating machines
the track or route along which a train travels
to join two or more things together
