WordReference Random House Learner's Dictionary of American English © 2026
sup•press /səˈprɛs/USA pronunciation   v. [+ object]
  1. to put an end to the activities of (a person, group, etc.):The government suppressed any movement toward democracy.
  2. Psychiatryto hold back deliberately (an impulse or action):He had a hard time suppressing his anger.
  3. to keep (a thought, memory, etc.) out of conscious awareness:I think you're suppressing your feelings of hostility.
  4. to withhold (evidence, a book, etc.) or keep back from public knowledge:The president's office suppressed the release of those figures.
  5. to stop or arrest (a cough, hemorrhage, etc.):to suppress a cough.
sup•pres•sant, n. [countable]The doctor gave you a cough suppressant.
sup•pres•sion /səˈprɛʃən/USA pronunciation  n. [uncountable]See -press-.

WordReference Random House Unabridged Dictionary of American English © 2026
sup•press  (sə pres),USA pronunciation v.t. 
  1. to put an end to the activities of (a person, body of persons, etc.):to suppress the Communist party.
  2. to do away with by or as by authority; abolish;
    stop (a practice, custom, etc.).
  3. Psychiatryto keep in or repress (a feeling, smile, groan, etc.).
  4. to withhold from disclosure or publication (truth, evidence, a book, names, etc.).
  5. to stop or arrest (a flow, hemorrhage, cough, etc.).
  6. to vanquish or subdue (a revolt, rebellion, etc.);
    quell;
    crush.
  7. Electricityto reduce or eliminate (an irregular or undesired oscillation or frequency) in a circuit.
  • Latin suppressus (past participle of supprimere to press down), equivalent. to sup- sup- + pressus (see press1)
  • late Middle English suppressen 1375–1425
sup•pressed•ly  (sə prestlē, -presid-),USA pronunciation adv.  sup•pressi•ble, adj. 
sup•pressive, adj. 
sup•pressive•ly, adv. 
sup•pressor, sup•presser, n. 

Collins Concise English Dictionary © HarperCollins Publishers::
suppress /səˈprɛs/ vb (transitive)
  1. to put an end to; prohibit
  2. to hold in check; restrain: I was obliged to suppress a smile
  3. to withhold from circulation or publication: to suppress seditious pamphlets
  4. to stop the activities of; crush: to suppress a rebellion
    • to reduce or eliminate (unwanted oscillations) in a circuit
    • to eliminate (a particular frequency or group of frequencies) in a signal
    • to resist consciously (an idea or a desire entering one's mind)
    • to exercise self-control by preventing the expression of (certain desires) Compare repress
Etymology: 14th Century: from Latin suppressus held down, from supprimere to restrain, from sub- down + premere to presssupˈpressible adj
'suppressing' also found in these entries (note: many are not synonyms or translations):

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