Dictionary.com
Thesaurus.com

Descartes

American  
[dey-kahrt, dey-kart] / deɪˈkɑrt, deɪˈkart /

noun

  1. René 1596–1650, French philosopher and mathematician.


Descartes British  
/ ˈdeɪˌkɑːt, dekart /

noun

  1. René (rəne). 1596–1650, French philosopher and mathematician. He provided a mechanistic basis for the philosophical theory of dualism and is regarded as the founder of modern philosophy. He also founded analytical geometry and contributed greatly to the science of optics. His works include Discours de la méthode (1637), Meditationes de Prima Philosophia (1641), and Principia Philosophiae (1644)

"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

Descartes Scientific  
/ dā-kärt /
  1. French mathematician and philosopher who discovered that the position of a point can be determined by coordinates, a discovery that laid the foundation for analytic geometry.


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.

See Examples For:

He also says Descartes called out strength in trade intelligence, freight visibility and customs filings.

From The Wall Street Journal Mar. 13, 2026

Let’s give the last word, plus one of mine, to the famous phrase of French philosopher and scientist Rene Descartes: “Cogito ergo sum ridens” — “I think, therefore I am laughing.”

From Los Angeles Times Mar. 1, 2025

In 1641, French philosopher René Descartes, writing his famous “Meditations on First Philosophy,” observed that a mind is fundamentally different from the body which contains it.

From Salon Nov. 10, 2024

An early effort came in the 17th century, by the French philosopher René Descartes who said: "I think therefore I am."

From BBC Jun. 15, 2024

Thus Descartes opted for the least common phrase available to him in French as a translation for lex naturae in order to give his phrase a precise reference to scientific laws, not moral ones.

From "The Invention of Science" by David Wootton

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training