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

  • n. The act or an instance of hindering, obstructing, or impeding.
  • n. Something that hinders, obstructs, or impedes.
  • n. Sports Illegal obstruction or hindrance of an opposing player, such as hindrance of a receiver by a defender in football, hindrance of a fielder by a base runner in baseball, or checking a player not in possession of the puck in ice hockey.
  • n. Football The legal blocking of defensive tacklers to protect and make way for the ball carrier.
  • n. Physics The variation of wave amplitude that occurs when waves of the same or different frequency come together.
  • n. Electronics The inhibition or prevention of clear reception of broadcast signals.
  • n. Electronics The distorted portion of a received signal.
  • n. The negative or distorting effect that new learning can have on previous learning or that previous learning can have on new learning.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The act of interfering with something, or something that interferes.
  • n. The illegal obstruction of an opponent in some ball games.
  • n. An effect caused by the superposition of two systems of waves, such as a distortion on a broadcast signal due to atmospheric or other effects.
  • n. In United States patent law, an inter partes proceeding to determine the priority issues of multiple patent applications; a priority contest.

from the GNU version of the Collaborative International Dictionary of English

  • n. The act or state of interfering
  • n. The mutual influence, under certain conditions, as from streams of light, or pulsations of sound, or, generally, two waves or vibrations of any kind, producing certain characteristic phenomena, as colored fringes, dark bands, or darkness, in the case of light, silence or increased intensity in sounds; neutralization or superposition of waves generally.
  • n. The act or state of interfering, or of claiming a right to the same invention.

from The Century Dictionary and Cyclopedia

  • n. The act of interfering; interposition; especially, intermeddling.
  • n. A clashing or collision; the act of coming into violent contact.
  • n. In farriery, a striking of one foot against the one next to it, as one hind foot against the other.
  • n. In Amer. patent law, the conflict between two patents or applications for patent which claim in whole or in part the same invention.
  • n. In physics, the mutual action of waves of any kind (whether those in water, or sound-, heat-, or light-waves) upon one another, by which, under certain conditions, the vibrations and their effects are increased, diminished, or neutralized.
  • n. In base-ball and foot-ball, the act of interfering. See interfere, v. i., 5 and 6.

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

  • n. (American football) blocking a player's path with your body
  • n. electrical or acoustic activity that can disturb communication
  • n. the act of hindering or obstructing or impeding
  • n. a policy of intervening in the affairs of other countries
  • n. any obstruction that impedes or is burdensome


Sorry, no etymologies found.


  • Poirot himself remains unchanged, although his interference is a catalyst for the woman's change.

    Book Report: Sad Cypress, by Agatha Christie

  • The official who resigned said he walked off because of what he calls interference of foreigners.

    CNN Transcript Oct 12, 2009

  • A spokesman for President Robert Mugabe lashed out at foreign countries at what he calls their interference with the country's election process.

    CNN Transcript Jul 1, 2008

  • Well, the militant group Hamas is protesting what it calls interference by the U.S. and Israel.

    CNN Transcript Feb 14, 2006

  • Scott McClellan telling reporters that the Bush administration is deeply concerned about what he called interference and intimidation by Syrian operatives in Lebanon.

    CNN Transcript Jun 10, 2005

  • He was somebody who even while the Syrians were here, was unsparing in his criticism about Syrian involvement and what he called interference in Lebanon.

    CNN Transcript Dec 12, 2005

  • Mugabe, in return, lambasted Britain for what he called interference in his country's internal affairs.

    ANC Daily News Briefing

  • Thirty six members of Jordan's major tribes have attacked what they called the interference of Queen Rania.

  • The delegations of Russia, China and Cuba all took the floor to denounce what they called interference in Syria's internal affairs and said that they would vote against the text.

    Yahoo! News: Business - Opinion

  • The mayor took issue with what he characterized as interference by outsiders in the city's plans. - News


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  • Interference is the addition (superposition) of two or more waves that results in a new wave pattern.


    February 7, 2008