Definition of rationale in English:



  • A set of reasons or a logical basis for a course of action or belief.

    ‘he explained the rationale behind the change’
    • ‘But other reasons and rationales exist for adopting and strengthening an historical perspective.’
    • ‘Those differences and the rationales behind them will be discussed below.’
    • ‘Economic theory provides numerous rationales for government involvement in health.’
    • ‘The rationale behind Early Intervention was no more than blindingly obvious common sense.’
    • ‘There are several reasons and rationales for guaranteeing the freedom of expression.’
    • ‘They could come back with their list and the rationale behind it for publication on Webdiary.’
    • ‘One of the soldiers responsible for this act of blatant provocation explained the rationale.’
    • ‘To understand the rationale behind this gamble, you need to be here in New Zealand.’
    • ‘Apparently there is a rationale behind postfeminism that does have a feminist basis.’
    • ‘There may be rationales for such beliefs, but the weight of the evidence I've seen does not convince me.’
    • ‘Here, its chair and previous vice chair explain the rationale behind the decisions’
    • ‘I can never understand the rationale behind some of the things that women do these days.’
    • ‘Yet, in that familiar paradox Freud makes his own, our drives have their own ineluctable logics and rationales.’
    • ‘It is one of the rationales behind the law of trespass.’
    • ‘The rationale behind protecting the head is to escape from the vertical heat rays.’
    • ‘A fair process requires publicity about the reasons and rationales that play a part in decisions.’
    • ‘It's the same rationale that lurks behind the ridiculous colour-coded terror alert level.’
    • ‘Diplomatically, the American is happy to explain the rationale behind his attitude this year.’
    • ‘What was the rationale behind the ludicrous decision to cutback on these schemes?’
    • ‘Still it is very interesting to see all the various excuses and rationales in one place.’
    reason, reasons, reasoning, thinking, basis, logical basis, Logic, grounds, sense
    View synonyms


Mid 17th century: modern Latin, neuter (used as a noun) of Latin rationalis ‘endowed with reason’ (see rational).