Definitions

from the GNU version of the Collaborative International Dictionary of English

  • proper n. A line of fortifications built before World War II to protect France's eastern border.

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

  • n. a fortification built before World War II to protect France's eastern border; initially considered to be impregnable, it was easily overrun by the German army in 1940

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