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⇱ diagnostic - WordReference.com Dictionary of English

diagnostic

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UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˌdaɪəgˈnɒstɪk/US:USA pronunciation: IPA and respellingUSA pronunciation: IPA/ˌdaɪægˈnɑstɪk/ ,USA pronunciation: respelling(dī′əg nos′tik)


WordReference Random House Unabridged Dictionary of American English © 2026
di•ag•nos•tic  (dī′əg nos′tik),USA pronunciation adj. 
  1. of, pertaining to, or used in diagnosis.
  2. serving to identify or characterize;
    being a precise indication.

n. 
  1. Medicinediagnosis (def. 1).
  2. Medicinea symptom or characteristic of value in diagnosis.
  3. Medicinea device or substance used for the analysis or detection of diseases or other medical conditions.
  4. Computing
    • a message output by a computer diagnosing an error in a computer program, computer system, or component device.
    • a program or subroutine that produces such messages.
  • Greek diagnōstikós, equivalent. to diagnōst(ós) distinguished (akin to diágnōsis; see diagnosis) + -ikos -ic
  • 1615–25
di′ag•nos′ti•cal•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::
diagnostic /ˌdaɪəɡˈnɒstɪk/ adj also: diagnostical
  1. of, relating to, or of value in diagnosis
 n
  1. any symptom that provides evidence for making a specific diagnosis
  2. a diagnosis
ˌdiagˈnostically adv
WordReference Random House Learner's Dictionary of American English © 2026
di•ag•no•sis /ˌdaɪəgˈnoʊsɪs/USA pronunciation   n., pl. -ses /-siz/.USA pronunciation  
  1. Medicine
    • the act or process of diagnosing: [uncountable]Dad was in for diagnosis.[countable]A diagnosis would require a full-day examination.
    • [countable] the decision reached from diagnosing:The doctor announced her diagnosis: cancer.
  2. an analysis of the cause or nature of a problem: [countable]a careful diagnosis of our problems in the sales department.[uncountable]careful diagnosis of the problems in our schools.
di•ag•nos•tic /ˌdaɪægˈnɑstɪk/USA pronunciation  adj. 
di•ag•nos•ti•cian /ˌdaɪægnɑˈstɪʃən/USA pronunciation  n. [countable]See -gnos-.

WordReference Random House Unabridged Dictionary of American English © 2026
di•ag•no•sis  (dī′əg nō′sis),USA pronunciation n., pl. -ses (-sēz).USA pronunciation 
  1. Medicine
    • the process of determining by examination the nature and circumstances of a diseased condition.
    • the decision reached from such an examination. Abbr.: Dx
  2. Biologyscientific determination;
    a description that classifies a group or taxon precisely.
  3. a determining or analysis of the cause or nature of a problem or situation.
  4. an answer or solution to a problematic situation.
  • Greek diágnōsis a distinguishing. See dia-, -gnosis
  • Neo-Latin
  • 1675–85

'diagnostic' also found in these entries (note: many are not synonyms or translations):

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