A systematic, usually extensive written discourse on a subject.(noun)
Obsolete A tale or narrative.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "treatise" in a sentence
"Ruskin, having formed the pleasant little original design of abolishing the difference between Popery and Protestantism, through the persuasive influence of his own special eloquence, set forth his views upon the matter in a book which he termed a treatise "on the construction of sheepfolds.""
"Watin's treatise is included s.v. Peinture, 6: 239 – 57 (plus plates?)."
"Whatever he should be called, de Massoul's treatise is now a regularly-cited source for information about eighteenth-century painters 'practice."