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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.

We have an aging population that requires services, tools, diagnostics, hospitalizations, drugs, and other things.

From Barron's • Apr. 30, 2026

Roche confirmed its full-year guidance after reporting a first-quarter rise in sales driven by high demand for its innovative medicines and diagnostics.

From The Wall Street Journal • Apr. 23, 2026

The BVA has said it isn't possible to accurately compare care in the UK with that delivered abroad, as costs, diagnostics and available treatments will vary.

From BBC • Mar. 24, 2026

Using DNA sequencing on tissue samples originally collected for veterinary diagnostics, the study, published in Science, showed that several genetic patterns in feline cancers mirror those found in people.

From Science Daily • Mar. 18, 2026

I ran both through full diagnostics to confirm they were working correctly.

From "The Martian" by Andy Weir

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.