diagnose

verb
di·​ag·​nose | \ ˈdī-ig-ˌnōs How to pronounce diagnose (audio) , -ˌnōz, ˌdī-ig-ˈnōs How to pronounce diagnose (audio) , -ˈnōz, -əg- \
diagnosed; diagnosing

Definition of diagnose

transitive verb

1a : to recognize (something, such as a disease) by signs and symptoms The other method of diagnosing gallstones is through an ultrasound examination, which has the advantages of being simple, safe and quick.— G. Timothy Johnson Pulmonary embolus was diagnosed in two of the actively treated patients …— Richard D. Sautter et al.
b : to recognize a disease or condition in The physicist and cosmologist was diagnosed with Lou Gehrig's disease when he was a 21-year-old student at Cambridge University.— Maria Cheng
2 : to analyze the cause or nature of The mechanic diagnosed the problem with the engine.

intransitive verb

: to identify a disease from its signs and symptoms : to make a diagnosis

Keep scrolling for more

Other Words from diagnose

diagnosable or diagnoseable \ ˌdī-​ig-​ˈnō-​sə-​bəl How to pronounce diagnose (audio) , -​əg-​ , -​zə-​ \ adjective

Examples of diagnose in a Sentence

The test is used to help in diagnosing heart disease. Thousands of new cases have been diagnosed in the past year. The doctor was unable to diagnose the skin condition. a new doctor with little experience diagnosing patients The mechanic was unable to diagnose the problem.
See More
Recent Examples on the Web A dozen MRIs and countless CT scans couldn’t diagnose the problem. Nathan Ruiz, baltimoresun.com, 9 July 2021 The study says the device can diagnose brain tumors with a sensitivity of 100% and a specificity of 97%, regardless of the size and malignancy of the tumors. Chris Smith, BGR, 22 June 2021 If there were concerns that the pathogen could cause human illness, researchers might seek to develop ways to diagnose, treat, or prevent it (with vaccines). Mark Kortepeter, Forbes, 2 June 2021 Last year, Moffit switched jobs to became chief people officer of a company named PathAI, which is developing technology to help diagnose and treat diseases. Dan Alexander, Forbes, 25 June 2021 The comments filled with people trying to help diagnose what Waddell had experienced. Colleen Murphy, Health.com, 22 June 2021 In 2008, the FDA convened a meeting to discuss the utility of novel imaging methods that were then being developed to measure amyloid, the brain protein thought to be involved in Alzheimer’s dementia, to help diagnose people with the disease. Madhav Thambisetty, STAT, 17 June 2021 The letter says making athletes take regular physicals could help diagnose problems down the road. Kirkland Crawford, USA TODAY, 10 June 2021 The letter says making athletes take regular physicals could help diagnose problems down the road. Kirkland Crawford, Detroit Free Press, 9 June 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'diagnose.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of diagnose

circa 1841, in the meaning defined at transitive sense 1a

History and Etymology for diagnose

back-formation from diagnosis

Keep scrolling for more

Learn More About diagnose

Time Traveler for diagnose

Time Traveler

The first known use of diagnose was circa 1841

See more words from the same year

Dictionary Entries Near diagnose

diaglyphic

diagnose

diagnosis

See More Nearby Entries 

Statistics for diagnose

Last Updated

23 Jul 2021

Cite this Entry

“Diagnose.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diagnose. Accessed 27 Jul. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for diagnose

diagnose

verb

English Language Learners Definition of diagnose

: to recognize (a disease, illness, etc.) by examining someone
: to recognize a disease, illness, etc., in (someone)
: to find the cause of (a problem)

diagnose

verb
di·​ag·​nose | \ ˈdī-əg-ˌnōs How to pronounce diagnose (audio) \
diagnosed; diagnosing

Kids Definition of diagnose

: to recognize (as a disease) by signs and symptoms The test is used for diagnosing strep throat.

diagnose

verb
di·​ag·​nose | \ ˈdī-ig-ˌnōs How to pronounce diagnose (audio) , -ˌnōz How to pronounce diagnose (audio) , ˌdī-ig-ˈ, -əg- \
diagnosed; diagnosing

Medical Definition of diagnose

transitive verb

1 : to recognize (as a disease) by signs and symptoms
2 : to diagnose a disease or condition in diagnosed the patient

Other Words from diagnose

diagnosable also diagnoseable \ ˌdī-​ig-​ˈnō-​sə-​bəl, -​əg-​, -​zə-​ How to pronounce diagnose (audio) \ adjective

WORD OF THE DAY

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!