from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A subway system.
  • adj. Metropolitan: metro Los Angeles.
  • n. A metropolitan area: "This metro ranks number one in unemployment” ( American Demographics).

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A metropolitan area.
  • adj. Metropolitan.
  • n. An underground railway.
  • n. A train that runs on such an underground railway.
  • n. An urban rapid transit light railway
  • n. A train that runs on such a railway.

from The Century Dictionary and Cyclopedia

  • n. One of a series of decimal submultiples of the meter: as, metro -sixteen, the sixteenth of this series of metros. See the extract and uno.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an electric railway operating below the surface of the ground (usually in a city)


French métro, short for (chemin de fer) métropolitain, metropolitan (railway), from Late Latin mētropolītānus; see metropolitan.
(American Heritage® Dictionary of the English Language, Fourth Edition)
French métro, apocopic form of métropolitain, from the Ancient Greek roots μήτηρ (meter, "mother") + πόλις (polis, "city"). (Wiktionary)
Abbreviation of metropolitan. (Wiktionary)



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