ratiocination

noun ra·ti·o·ci·na·tion \ ˌra-tē-ˌō-sə-ˈnā-shən , ˌra-shē- , -ˌä- \
|Updated on: 14 Jun 2018

Definition of ratiocination

1 : the process of exact thinking : reasoning
2 : a reasoned train of thought

ratiocinative

play \ˌra-tē-ˈō-sə-ˌnā-tiv, ˌra-shē-, -ˈä-\ adjective

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Examples of ratiocination in a Sentence

  1. as an expert in ratiocination, the detective Sherlock Holmes has few rivals

Recent Examples of ratiocination from the Web

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

Did You Know?

Edgar Allan Poe is said to have called the 1841 story The Murders in the Rue Morgue his first "tale of ratiocination." Many today agree with his assessment and consider that Poe classic to be the world's first detective story. Poe didn't actually use "ratiocination" in Rue Morgue, but the term does appear three times in its 1842 sequel, The Mystery of Marie Roget. In Marie Roget, the author proved his reasoning ability ("ratiocination" traces to "ratio," Latin for reason or "computation"). The second tale is based on an actual murder, and as the case unfolded after the publication of Poe's work, it became clear that his fictional detective had done an amazing job of reasoning through the crime.

First Known Use of ratiocination

1532

in the meaning defined at sense 1

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