First Known Use: 14th century
Dictionary
treatise
noun trea·tise \ˈtrē-təs also -təz\
: a book, article, etc., that discusses a subject carefully and thoroughly
Full Definition of TREATISE
1
: a systematic exposition or argument in writing including a methodical discussion of the facts and principles involved and conclusions reached <a treatise on higher education>
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Origin of TREATISE
Middle English tretis, from Anglo-French tretiz, alteration of tretez, traitet, from Medieval Latin tractatus, from Latin tractare to treat, handle
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