rationalize

verb

ra·​tio·​nal·​ize ˈrash-nə-ˌlīz How to pronounce rationalize (audio)
ˈra-shə-nə-ˌlīz
rationalized; rationalizing; rationalizes
Synonyms of rationalize

transitive verb

1
: to bring into accord with reason or cause something to seem reasonable: such as
a
: to substitute a natural for a supernatural explanation of
rationalize a myth
b
: to attribute (one's actions) to rational and creditable motives without analysis of true and especially unconscious motives
rationalized his dislike of his brother
broadly : to create an excuse or more attractive explanation for
rationalize the problem
2
: to free (a mathematical expression) from irrational parts
rationalize a denominator
3
: to apply research-based managerial principles to (something, such as an industry or its operations) for increased productivity and efficiency

intransitive verb

: to provide plausible but untrue reasons for conduct
rationalizable adjective
rationalizer noun
plural rationalizers

Examples of rationalize in a Sentence

She tried to rationalize her grandson's strange behavior by blaming it on the boy's father. He couldn't rationalize buying such an expensive car. She knows she shouldn't have done it—she's just trying to rationalize. Management is thinking of ways to rationalize our system of production.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The company also expects to rationalize and consolidate systems and processes, while eliminating overlapping corporate and centralized resources. Jeff Marks, CNBC, 2 Sep. 2026 Patchett rationalizes Mary’s decision by establishing that Nutmeg was old. Literary Hub, 2 Sep. 2026 At a time when antisemitism is too often minimized, rationalized or repackaged in more socially acceptable language, this kind of moral clarity matters. Tom Tapp, Deadline, 22 Aug. 2026 The offense was bad Saturday, and there’s no spin or rationalizing the performance. Zach Berman, New York Times, 16 Aug. 2026 See All Example Sentences for rationalize

Word History

First Known Use

1665, in the meaning defined at transitive sense 1

Time Traveler
The first known use of rationalize was in 1665

Browse Nearby Words

Cite this Entry

“Rationalize.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rationalize. Accessed 4 Sep. 2026.

Kids Definition

rationalize

verb
ra·​tio·​nal·​ize ˈrash-nə-ˌlīz How to pronounce rationalize (audio)
-ən-ᵊl-ˌīz
rationalized; rationalizing
1
: to bring into agreement with reason or cause something to seem believable
2
: to remove irrational expressions from
rationalize a denominator

Medical Definition

rationalize

verb
ra·​tio·​nal·​ize
rationalized also British rationalised; rationalizing also British rationalising

transitive verb

: to bring into accord with reason or cause something to seem reasonable
especially : to attribute (one's actions) to rational and creditable motives without analysis of true and especially unconscious motives
he tried to rationalize his cruel behavior

intransitive verb

: to provide plausible but untrue reasons for conduct
rationalizer noun
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