Interference is the act of interfering, invading, or poaching. Interference may also refer to:

Communications

Interference (communication) In telecommunications, an interference is that which modifies a signal in a disruptive manner, as it travels along a communication channel between its source and receiver. The term is often used to refer to the addition of unwanted signals t ...

, anything which alters, modifies, or disrupts a message *

Adjacent-channel interference Adjacent-channel interference (ACI) is interference caused by extraneous power from a signal in an adjacent channel. ACI may be caused by inadequate filtering (such as incomplete filtering of unwanted modulation products in FM systems), improper ...

, caused by extraneous power from a signal in an adjacent channel *

Co-channel interference Co-channel interference or CCI is crosstalk from two different radio transmitters using the same channel. Co-channel interference can be caused by many factors from weather conditions to administrative and design issues. Co-channel interference ...

, also known as crosstalk *

Electromagnetic interference Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrost ...

, disturbance that affects an electrical circuit * Inter-carrier interference, caused by Doppler shift in OFDM modulation *

Intersymbol interference In telecommunication, intersymbol interference (ISI) is a form of distortion of a signal in which one symbol interferes with subsequent symbols. This is an unwanted phenomenon as the previous symbols have a similar effect as noise, thus maki ...

Entertainment

* Interference (band), an Irish band which formed in 1984 * ''Interference'' (Crease album), 1995 * ''Interference'' (Cubanate album), 1998 * ''Interference'' (film), Paramount's first all-talking film * "Interference" (Prison Break episode), a 2007 episode * '' Interference – Book One'', a 1999 ''Doctor Who'' novel by Lawrence Miles * '' Interference – Book Two'', a 1999 ''Doctor Who'' novel by Lawrence Miles * ''Interference'' (novel), a 2019 novel by Sue Burke

Science

Biology

Crossover interference Crossover interference is the term used to refer to the non-random placement of crossovers with respect to each other during meiosis. The term is attributed to Hermann Joseph Muller, who observed that one crossover "interferes with the coincident ...

, non-random placement of crossovers with respect to each other during meiosis *

RNA interference RNA interference (RNAi) is a biological process in which RNA molecules are involved in sequence-specific suppression of gene expression by double-stranded RNA, through translational or transcriptional repression. Historically, RNAi was known by o ...

, a process within living cells that moderates the activity of their genes * Vaccine interference, interaction between two or more vaccines mixed in the same formulation * Viral interference, one viral infection inhibiting another

Physics

Interference engine An interference engine is a type of 4-stroke internal combustion piston engine in which one or more valves in the fully open position extends into any area through which the piston may travel. By contrast, in a non-interference engine, the piston ...

Interference fit An interference fit, also known as a pressed fit or friction fit is a form of fastening between two ''tight'' fitting mating parts that produces a joint which is held together by friction after the parts are pushed together. Depending on the am ...

, in engineering *

Interference lithography Interference lithography (or holographic lithography) is a technique for patterning regular arrays of fine features, without the use of complex optical systems or photomasks. Basic principle The basic principle is the same as in interferometry or ...

, in optics *

Thin-film interference Thin-film interference is a natural phenomenon in which light waves reflected by the upper and lower boundaries of a thin film interfere with one another, either enhancing or reducing the reflected light. When the thickness of the film is an ...

, in optics *

Wave interference In physics, interference is a phenomenon in which two waves combine by adding their displacement together at every single point in space and time, to form a resultant wave of greater, lower, or the same amplitude. Constructive and destructive ...

, in physics

Other

Interference ripples Interference Ripples are a type of sedimentary structure Sedimentary structures include all kinds of features in sediments and sedimentary rocks, formed at the time of deposition. Sediments and sedimentary rocks are characterized by bedding, ...

, in geology *

Interference theory The interference theory is a theory regarding human memory. Interference occurs in learning. The notion is that memory encoded in long-term memory (LTM) are forgotten and cannot be retrieved into short-term memory (STM) because either memory could ...

, in psychology

Sports

Pass interference In American and Canadian gridiron football, pass interference (PI) is a foul that occurs when a player interferes with an eligible receiver's ability to make a fair attempt to catch a forward pass. Pass interference may include tripping, pushing ...

, a penalty in American football and Canadian Football *

Interference (baseball) In baseball, interference occurs in situations in which a person illegally changes the course of play from what is expected. Interference might be committed by players on the offense, players not currently in the game, catchers, umpires, or spec ...

, changing the course of play from what is expected * Interference (ice hockey)

Other uses

* Interference (chess) *

Interference proceeding An interference proceeding, also known as a priority contest, is an inter partes proceeding to determine the priority issues of multiple patent applications. It is a proceeding unique to the patent law of the United States. Unlike in most other co ...

, in U.S. patent law *

Interfering thread nut An interfering thread nut is a type of locknut that has an undersized root diameter. This creates an interference between the nut and the fastener, plastically deforming the threads Thread may refer to: Objects * Thread (yarn), a kind of thin y ...

, a type of locknut * Statistical interference, in statistics