from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The act or an instance of hindering, obstructing, or impeding.
  • noun Something that hinders, obstructs, or impedes.
  • noun 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.
  • noun Football The legal blocking of defensive tacklers to protect and make way for the ball carrier.
  • noun Physics The variation of wave amplitude that occurs from the superposition of two or more waves.
  • noun The inhibition or prevention of clear reception of broadcast signals.
  • noun The distorted portion of a received signal.
  • noun The negative or distorting effect that new learning can have on previous learning or that previous learning can have on new learning.

from The Century Dictionary.

  • noun The act of interfering; interposition; especially, intermeddling.
  • noun A clashing or collision; the act of coming into violent contact.
  • noun In farriery, a striking of one foot against the one next to it, as one hind foot against the other.
  • noun In Amer. patent law, the conflict between two patents or applications for patent which claim in whole or in part the same invention.
  • noun 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.
  • noun In base-ball and foot-ball, the act of interfering. See interfere, v. i., 5 and 6.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The act or state of interfering
  • noun (Physics) 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.
  • noun (Patent Law) The act or state of interfering, or of claiming a right to the same invention.
  • noun (Optics) the figures observed when certain sections of crystallized bodies are viewed in converging polarized light; thus, a section of a uniaxial crystal, cut normal to the vertical axis, shows a series of concentric colored rings with a single black cross; -- so called because produced by the interference of luminous waves.
  • noun (Optics) See Fringe.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun The act of interfering with something, or something that interferes.
  • noun sports The illegal obstruction of an opponent in some ball games.
  • noun physics 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.
  • noun US, law In United States patent law, an inter partes proceeding to determine the priority issues of multiple patent applications; a priority contest.

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

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


Sorry, no etymologies found.


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

    Archive 2008-10-01 Ulysses 2008

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

    Book Report: Sad Cypress, by Agatha Christie Ulysses 2008

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

    CNN Transcript Oct 12, 2009 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 2008

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

    CNN Transcript Feb 14, 2006 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 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 2005

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

    ANC Daily News Briefing 2001

  • Thirty six members of Jordan's major tribes have attacked what they called the interference of Queen Rania. 2011

  • 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 2011


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


    February 7, 2008