rationalise

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Definition

  1. Verb (Transitive):

    • To make something more logical, efficient, or consistent by applying reason or a systematic method. This often involves reorganizing to remove waste or redundancy.
    • To attempt to explain or justify (one's own or another's behavior or attitude) with logical reasons, even if these are not the true motives.
    • In mathematics, to eliminate irrational numbers (such as square roots) from the denominator of a fraction.

  2. Verb (Intransitive):

    • To think or argue in a logical, reason-based manner.
Usage and Examples
  • To make efficient/systematic:
    • The company rationalised its supply chain to reduce costs.
    • We need to rationalise the number of product lines we offer.
  • To justify with plausible reasons:
    • He rationalised his excessive spending by calling it an investment.
    • She tried to rationalise her rude comment, saying she was just tired.
  • In Mathematics:
    • The students learned how to rationalise the denominator of the expression 1/√2.
  • To think logically (intransitive):
    • Instead of panicking, we must stop and rationalise.
Advanced Usage
  • Psychological Defence Mechanism: In psychology, "to rationalise" specifically refers to a defence mechanism where controversial behaviors or feelings are justified and explained in a seemingly rational or logical manner to avoid the true explanation.
    • After forgetting his friend's birthday, he rationalised it by claiming he disapproved of commercial celebrations.
Variants and Related Words
  • Rationalisation (Noun): The action or process of rationalising.
    • The rationalisation of the manufacturing process led to job losses.
    • His story was a weak rationalisation for being late.
  • Rational (Adjective): Based on or in accordance with reason or logic.
  • Rationality (Noun): The quality of being based on reason.
Synonyms
  • Streamline, reorganise, optimise (for making efficient).
  • Justify, explain away, excuse (for justifying behavior).
  • Reason, think logically (for intransitive use).
Antonyms
  • Irrationalise (rare).
  • Complicate, disorganise.
  • Condemn (for the justification sense).
Related Phrases
  • To rationalise away: To dismiss or minimize (a problem, doubt, or feeling) by explaining it away with logic.
    • He rationalised away his guilt by focusing on the positive outcome.
Verb
  1. weed out unwanted or unnecessary things
    • We had to lose weight, so we cut the sugar from our diet
  2. remove irrational quantities from
    • This function can be rationalized
  3. think rationally; employ logic or reason
    • When one wonders why one is doing certain things, one should rationalize
  4. defend, explain, clear away, or make excuses for by reasoning
    • rationalize the child's seemingly crazy behavior
    • he rationalized his lack of success
  5. structure and run according to rational or scientific principles in order to achieve desired results
    • We rationalized the factory's production and raised profits

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