rationale

[ rash-uh-nal ]
/ ˌræʃ əˈnæl /

noun

the fundamental reason or reasons serving to account for something.
a statement of reasons.
a reasoned exposition of principles.

Origin of rationale

1650–60; < Latin: neuter of ratiōnālis rational
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for rationale

British Dictionary definitions for rationale

rationale

/ (ˌræʃəˈnɑːl) /

noun

a reasoned exposition, esp one defining the fundamental reasons for a course of action, belief, etc

Word Origin for rationale

C17: from New Latin, from Latin ratiōnālis
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012