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Definition of rationalization

rationalization

/ˌræʃ.ən.əl.əˈzeɪ.ʃən/
(UK: rationalisation)
ra · tion · al · i · za · tion

Adverb:rationally
•
Plural:rationalizations
•
Adjective:rational
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rationalization Lexical Profile

rationalization Game Scores & Validity

• noun

1

The action of attempting to explain or justify behavior or an attitude with logical, plausible reasons, even if these are not appropriate or true.

Example

"His claim that he missed the deadline to conduct more research was merely a rationalization for his procrastination."


2

The reorganization of a company, industry, or system in order to increase its operational efficiency and reduce waste, often by downsizing or consolidating.

Example

"The rationalization of the manufacturing division resulted in lower production costs and a more streamlined supply chain."


3

In mathematics, the process of eliminating radicals or imaginary numbers from the denominator of an algebraic fraction without changing the value of the expression.

Example

"Today's algebra lesson focused on the rationalization of denominators containing square roots."

Synonyms
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Antonyms
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• Rhymes for rationalization

Word Origin & Etymology

Formed in the early 19th century from the verb 'rationalize' and the noun suffix '-ation', ultimately tracing back to the Latin 'rationalis' (belonging to reason), from 'ratio' (reckoning, calculation, or reason). Its psychological sense as a defense mechanism was popularized in the early 20th century through psychoanalytic theory.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Rationalization. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/rationalization
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