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

  • n. A hostile invasion; a raid.
  • n. An advance, especially at another's expense; an encroachment. Often used in the plural: Foreign products have made inroads into the American economy.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. an advance into enemy territory, an incursion, an attempted invasion
  • n. progress made toward accomplishing a goal or solving a problem
  • v. To make an inroad into; to invade.

from the GNU version of the Collaborative International Dictionary of English

  • n. The entrance of an enemy into a country with purposes of hostility; a sudden or desultory incursion or invasion; raid; encroachment.
  • transitive v. To make an inroad into; to invade.

from The Century Dictionary and Cyclopedia

  • To make an inroad into; invade.
  • To make an inroad; encroach; depredate.
  • n. A predatory or hostile incursion; a raid by public enemies; a temporary or desultory invasion.
  • n. Forcible entrance; powerful or sudden influx or incursion; forcible or insidious encroachment.

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

  • n. an encroachment or intrusion
  • n. an invasion or hostile attack


in1 + road, riding, raid (obsolete).
(American Heritage® Dictionary of the English Language, Fourth Edition)



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  • A commonly used word (usually in the plural), but with military undertones/origins from the definition "hostile invasion."

    October 9, 2008