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Suppression may refer to:

Laws

• Suppression of Communism Act
• Suppression order 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), 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, 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
• Reflux suppressant, in medicine
• Suppression subtractive hybridization, in biochemistry
• Thought suppression, 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, in nuclear physics
• Zero suppression, 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, 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 suppression, e.g., of electrical noise from switches and motors
• Fire suppression system
  • Firefighting, 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, a logical fallacy

• Disambiguation pages