rational numberrationalism rationale (English) [ IPA: ˌræʃəˈnæl ASM: ৰেচনেল]Contributed by: PS on 2007-12-16 1. (Abstract Noun) an explanation of reasons to support something. কিহবাৰ সপক্ষে দৰ্শোৱা কাৰণ। English: argument, rationale, reason, Assamese: যুক্তি, Bodo: जुकिटगोनां बाथ्रा