Dictionary.com
Thesaurus.com
Synonyms

diagnostics

American  
[dahy-uhg-nos-tiks] / ˈdaɪ əgˈnɒs tɪks /

noun

(used with a singular verb)
  1. the discipline or practice of diagnosis.


diagnostics British  
/ ˌdaɪəɡˈnɒstɪks /

noun

  1. (functioning as singular) the art or practice of diagnosis, esp of diseases

"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

Etymology

Origin of diagnostics

First recorded in 1660–70; see origin at diagnostic, -ics

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Roche Holding ROP 1.07%increase; green up pointing triangle said it agreed to buy PathAI for up to $1.05 billion in a deal that seeks to bolster the artificial-intelligence offerings of its diagnostics division.

From The Wall Street Journal • May 7, 2026

The accompanying Cosmos software allows customers to run diagnostics and telemetry to check on their systems, Mohan added.

From MarketWatch • May 5, 2026

It also introduces a promising method for improving diagnostics in laser fusion research.

From Science Daily • May 1, 2026

Another challenge, she said, was "to integrate the sharing of genetic data, now as crucial as that of physical viruses for developing vaccines, treatments, and diagnostics".

From Barron's • Apr. 27, 2026

"But all we have left is the wait. Your work schedules are cleared. All scientific experiments are suspended. Sleep if you can, run diagnostics on your equipment if you can't."

From "The Martian" by Andy Weir

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "diagnostics" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com