Search Dictionary
Definition of diagnose

diagnose

/ˈdaɪ.əɡ.noʊs/
di · ag · nose

Adverb:diagnostically
•
Adjective:diagnostic
•
Past Simple:diagnosed
•
Past Participle:diagnosed
•
Present Participle:diagnosing
JUMP TO:

diagnose Lexical Profile

diagnose Game Scores & Validity

• verb

1

To identify the nature of an illness or other medical condition by examining the symptoms and clinical signs.

Example

"The specialist was able to diagnose the rare condition after reviewing the blood test results."


2

To analyze and determine the root cause or nature of a mechanical, technical, or systemic problem.

Example

"The network engineer ran several automated scripts to diagnose the cause of the server outage."

Synonyms
View all synonyms for diagnose
Antonyms
View all antonyms for diagnose

Word Nuance & Usage

When referring to a person, the standard construction is to diagnose a patient *with* a condition (e.g., "She was diagnosed with asthma"), whereas a medical condition itself is diagnosed *in* a patient (e.g., "Asthma was diagnosed in the child").

Word Origin & Etymology

Formed in the mid-19th century as a back-formation from "diagnosis," which derives via Modern Latin from the Ancient Greek "diagnōsis" (a discerning or distinguishing), from "diagignōskein" (to discern or distinguish thoroughly), combining "dia-" (apart) and "gignōskein" (to know or perceive).

Cite this Entry


Wordmom. (2026). Definition of Diagnose. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/diagnose
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Dictionary & Reference
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.