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English to English noun
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(law) an explanation of the fundamental reasons (especially an explanation of the working of some device in terms of laws of nature) |  | Example: the rationale for capital punishment
the principles of internal-combustion engines
source: wordnet30
| 2 |
An explanation or exposition of the principles of some opinion, action, hypothesis, phenomenon, or the like; also, the principles themselves. | | source: webster1913
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