Noun

The act of interfering with something, or something that interferes.

(sports) The illegal obstruction of an opponent in some ball games.

They were glued to the TV, as the referee called out a fifteen yard penalty for interference .

(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.

They wanted to watch the game on TV, but there was too much interference to even make out the score on the tiny screen.

(US, legal) In United States patent law, an inter partes proceeding to determine the priority issues of multiple patent applications; a priority contest.

(chess) The interruption of the line between an attacked piece and its defender by sacrificially interposing a piece.

Noun

(en noun)

A secret agreement for an illegal purpose; conspiracy.

*{{quote-magazine, date=2013-06-07, author=(Gary Younge)

, volume=188, issue=26, page=18, magazine=(The Guardian Weekly) , title= Hypocrisy lies at heart of Manning prosecution , passage=The dispatches […] also exposed the blatant discrepancy between the west's professed values and actual foreign policies. Having lectured the Arab world about democracy for years, its collusion in suppressing freedom was undeniable as protesters were met by weaponry and tear gas made in the west, employed by a military trained by westerners.}}