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[suh-presh-uh n] /səˈprɛʃ ən/
the act of suppressing.
the state of being suppressed.
Psychoanalysis. conscious inhibition of an impulse.
Botany. the absence of parts normally or usually present due to the action of frost, disease, or insects.
Radio, Electronics. the elimination of a component of a varying emission, as the elimination of a frequency or group of frequencies from a signal.
Electricity. the reduction or elimination of irregular current oscillations or frequencies in a circuit.
Origin of suppression
1520-30; < Latin suppressiōn- (stem of suppressiō) a pressing under. See suppress, -ion
Related forms
nonsuppression, noun
resuppression, noun
self-suppression, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for suppression
  • Organic weed control encourages weed suppression rather than elimination.
  • In some cases, hormone replacement or suppression may be necessary.
  • The secret: the suppression of self-expression is impossible.
  • The risks of tolerance, the certainties of suppression.
  • His reign was characterised by a combination of skilful foreign policy and ruthless suppression of domestic dissent.
  • And what remained in semi-natural habitats suffered invasion by woody shrubs--a consequence of fire suppression.
  • The rumors about fertility suppression drugs need to be true.
  • Call quality is great thanks to a noise suppression technology.
  • The modern view is that the complete suppression of fire has upset the natural order of things.
  • Sturdy aluminum tripod provides excellent vibration suppression.
British Dictionary definitions for suppression


the act or process of suppressing or the condition of being suppressed
(psychoanal) the conscious avoidance of unpleasant thoughts Compare repression (sense 2)
(electronics) the act or process of suppressing a frequency, oscillation, etc
(biology) the failure of an organ or part to develop
(med) the cessation of any physiological process
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for suppression

1520s, from Latin suppressionem (nominative suppresio), noun of action from past participle stem of supprimere (see suppress).

Online Etymology Dictionary, © 2010 Douglas Harper
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suppression in Medicine

suppression sup·pres·sion (sə-prěsh'ən)

  1. The act of suppressing or the state of being suppressed.

  2. Conscious exclusion of unacceptable desires, thoughts, or memories from the mind.

  3. The sudden arrest of the secretion of a fluid, such as urine or bile.

  4. The checking or curtailing of an abnormal flow or discharge.

  5. The effect of a second genetic mutation that reverses a phenotypic change that had been caused by a previous mutation at a different location on the chromosome.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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