Rationale
WordNet
noun
(1) (law) an explanation of the fundamental reasons (especially an explanation of the working of some device in terms of laws of nature)
"The rationale for capital punishment"
"The principles of internal-combustion engines"
WiktionaryText
Etymology
Around 1650-1650 from the , the neuter form of .
Noun
- an explanation of the basis or fundamental reasons for something
- a justification or rationalization for something
- a liturgical vestment worn by Christian bishops of various denominations