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[prog-noh-sis] /prɒgˈnoʊ sɪs/
noun, plural prognoses
[prog-noh-seez] /prɒgˈnoʊ siz/ (Show IPA)
Medicine/Medical. a forecasting of the probable course and outcome of a disease, especially of the chances of recovery.
a forecast or prognostication.
Origin of prognosis
1645-55; < Late Latin < Greek prógnōsis foreknowledge. See pro-2, gnosis
Can be confused
diagnosis, prognosis. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for prognosis
Contemporary Examples
Historical Examples
  • We never permit a patient to pronounce a prognosis upon his own case!

    Hidden Hand

    Emma Dorothy Eliza Nevitte Southworth
  • If my prognosis is concurred in, these should reach Mudros on or about 1st August.

  • His prognosis of brain injuries was much better than that of his predecessors.

  • I can, as a medical man, bear witness that your prognosis was justified by the event.

    Fruits of Culture Leo Tolstoy
  • The prognosis of fracture of the tibia, as a rule, must be unfavorable.

    Special Report on Diseases of the Horse United States Department of Agriculture
British Dictionary definitions for prognosis


noun (pl) -noses (-ˈnəʊsiːz)
  1. a prediction of the course or outcome of a disease or disorder
  2. the chances of recovery from a disease
any forecast or prediction
Word Origin
C17: via Latin from Greek: knowledge beforehand
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 prognosis

1650s, "forecast of the probable course of a disease," from Late Latin prognosis, from Greek prognosis "foreknowledge," also, in medicine, "predicted course of a disease," from stem of progignoskein "come to know beforehand," from pro- "before" (see pro-) + gignoskein "come to know" (see gnostic). General (non-medical) use in English from 1706. A back-formed verb prognose is attested from 1837. Related: Prognosed; prognosing.

Online Etymology Dictionary, © 2010 Douglas Harper
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prognosis in Medicine

prognosis prog·no·sis (prŏg-nō'sĭs)
n. pl. prog·no·ses (-sēz)

  1. A prediction of the probable course and outcome of a disease.

  2. The likelihood of recovery from a disease.

prog'nos·ti'cian (-nŏs-tĭsh'ən) n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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prognosis in Culture
prognosis [(prog-noh-sis)]

A medical prediction of the future course of a disease and the chance for recovery.

Note: Prognosis is often used as a general term for predicting the unfolding of events: “The governor said that the prognosis for the state's financial future is bleak.”
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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