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metro-(word root) measure
met·ro 2(mĕt′rō) Informal
n., pl. -ros. (often cap.)
adj., n., pl. -ros. Informal. adj.
subway underground metro
A subway is a path for pedestrians under a busy road.
In some American cities, the subway is a railway system in which electric trains travel below the ground in tunnels. In other cities this is called the metro.
Some speakers of British English also use subway to refer to a British railway system like this, but the London and Glasgow systems are usually called the underground. The London system is also called the tube.
|Noun||1.||metro - an electric railway operating below the surface of the ground (usually in a city); "in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'"|