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

  • n. The leading portion of a cold atmospheric air mass moving against and eventually replacing a warm air mass.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A cold front is the leading edge of an advancing mass of cold air.

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

  • n. the front of an advancing mass of colder air


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