Suppression may refer to:

Laws

Suppression of Communism Act The Suppression of Communism Act, 1950 (Act No. 44 of 1950), renamed the Internal Security Act in 1976, was legislation of the national government in apartheid South Africa which formally banned the Communist Party of South Africa and proscribed ...

Suppression order A gag order (also known as a gagging order or suppression order) is an order, typically a legal order by a court or government, restricting information or comment from being made public or passed onto any unauthorized third party. The phrase may ...

a type of censorship where a court rules that certain information cannot be published * Tohunga Suppression Act 1907, an Act of the Parliament of New Zealand aimed to replace tohunga as traditional Māori healers with "modern" medicine

Mathematics and science

Biology, psychology and healthcare

Suppression (eye) Suppression of an eye is a subconscious adaptation by a person's brain to eliminate the symptoms of disorders of binocular vision such as strabismus, convergence insufficiency and aniseikonia. The brain can eliminate double vision by ignoring all o ...

, of an eye is a subconscious adaptation by a person's brain to eliminate the symptoms of disorders of binocular vision such as strabismus, convergence insufficiency and aniseikonia * Appetite suppression * Bone marrow suppression, the decrease in cells responsible for providing immunity, carrying oxygen, and those responsible for normal blood clotting * Cough medicine, which may contain a cough suppressant, a medicinal drug used in an attempt to treat coughing *

Expressive suppression Expressive suppression is the intentional reduction of the facial expression of an emotion. It is a component of emotion regulation. Expressive suppression is a concept "based on individuals' emotion knowledge, which includes knowledge about the ...

, a psychological aspect of emotion regulation * Flash suppression, a phenomenon of visual perception in which an image presented to one eye is suppressed by a flash of another image presented to the other eye *

Genetic suppression Epistasis is a phenomenon in genetics in which the effect of a gene mutation is dependent on the presence or absence of mutations in one or more other genes, respectively termed modifier genes. In other words, the effect of the mutation is dep ...

Reflux suppressant A reflux suppressant is any one of a number of drugs used to combat oesophageal reflux. Commonly, following ingestion a 'raft' of alginic acid is created, floating on the stomach contents by carbon dioxide released by the drug. This forms a mechan ...

, in medicine *

Suppression subtractive hybridization Subtractive hybridization is a technology that allows for PCR-based amplification of only cDNA fragments that differ between a control (driver) and experimental transcriptome. cDNA is produced from mRNA. Differences in relative abundance of tran ...

, in biochemistry *

Thought suppression Thought suppression is a psychological defence mechanism. It is a type of motivated forgetting in which an individual consciously attempts to stop thinking about a particular thought. It is often associated with obsessive–compulsive disorder (OC ...

, the psychological process of deliberately trying to stop thinking about certain thoughts, associated with obsessive-compulsive disorder

Other uses in mathematics and science

Compton suppression Electronic anticoincidence is a method (and its associated hardware) widely used to suppress unwanted, "background" events in high energy physics, experimental particle physics, gamma-ray spectroscopy, gamma-ray astronomy, experimental nuclear physi ...

, in nuclear physics *

Zero suppression Zero suppression is the removal of redundant zeroes from a number. This can be done for storage, page or display space constraints or formatting reasons, such as making a letter more legible. Examples * 00049823 → 49823 * 7.678600000 → 7.6 ...

, in mathematics and information theory

Politics

* Censorship, the suppression of public communication considered objectionable to the general body of people as determined by a government or media outlet * Suppression of dissent, occurs when an individual or group tries to censor, persecute or otherwise oppress the other party rather than communicate logically * Suppression of evidence, the act of preventing evidence from being shown in a trial * Voter suppression, a strategy to influence the outcome of an election by discouraging or preventing people from exercising their right to vote *

Catch and kill Catch and kill is a surreptitious technique employed by newspapers and media outlets to prevent an individual from publicly revealing information damaging to a third party. Using a legally enforceable non-disclosure agreement, the tabloid purpor ...

, buying exclusive publication rights to an individual's story, and then suppressing the information

Religion

* Suppression (parish), the forced closure of a Catholic parish or association * Religious intolerance, or religious suppression, intolerance against another's religious beliefs or practices by individuals, private groups, government agencies or the whole government * Suppressive Person, a Church of Scientology concept discussed in the book, ''The Cause of Suppression''

Technology

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, electros ...

suppression, e.g., of electrical noise from switches and motors * Fire suppression system **

Firefighting Firefighting is the act of extinguishing or preventing the spread of unwanted fires from threatening human lives and destroying property and the environment. A person who engages in firefighting is known as a firefighter. Firefighters typically ...

, involves the suppression of fire * Free energy suppression and other suppressed technology * Silence suppression, in telephony * Transient-voltage-suppression diode, an electronic component used to protect sensitive electronics from voltage spikes induced on connected wires

Weapons

* Suppressive fire, weapons fire that degrades the performance of a target below the level needed to fulfill its mission * Suppressor, a device attached to or part of the barrel of a firearm which reduces the amount of noise and flash generated by firing the weapon

Other uses

Suppressed correlative The fallacy of suppressed correlative is a type of argument that tries to redefine a correlative (one of two mutually exclusive options) so that one alternative encompasses the other, i.e. making one alternative impossible. This has also been know ...

, a logical fallacy {{disambiguation