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rationale

American  
[rash-uh-nal] / ˌræʃ əˈnæl /

noun

  1. the fundamental reason or reasons serving to account for something.

    Synonyms:
    ground, basis, logic
  2. a statement of reasons.

  3. a reasoned exposition of principles.


rationale British  
/ ˌræʃəˈnɑːl /

noun

  1. a reasoned exposition, esp one defining the fundamental reasons for a course of action, belief, etc

"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 rationale

First recorded in 1650–60; from Latin: neuter of ratiōnālis rational

Explanation

The rationale for something is the basic or underlying reason or explanation for it. This noun (pronounced "rash-uh-NAL") is usually used in the singular: What was the rationale behind his decision to quit? The related adjective rational means "based on facts or reason" or "having the ability to think clearly." An example of a rational rationale? You add extra baking soda to pancake batter under the rationale that if you want them to be fluffier, you need more rising agent. Rationale is from Latin, from rationalis "relating to reason," from ratio "calculation, reason," from rērī "to consider, think."

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Vocabulary lists containing rationale

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.

Rationale: You spend more than 40 percent of your strokes with the putter, with 60 percent of shots coming from 100 yards and in.

From Golf Digest • Apr. 21, 2017

Rationale: You’ve belonged to your club for a number of years.

From Golf Digest • Apr. 21, 2017

Document: The Legal Rationale for Surveillance The Obama administration on Friday released documents related to the legal basis for surveillance efforts.

From New York Times • Aug. 9, 2013

Rationale: Bruins have done nicely, but win over Nebraska looks less daunting and they stumbled against Oregon State at home.

From Seattle Times • Oct. 1, 2012

I have written an essay on the "Rationale of Verse," in which the whole topic is surveyed ab initio, and with reference to general and immutable principles.

From Graham's Magazine Vol XXXII No. 1 January 1848 by Conrad, Robert Taylor

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