Noun

(uncountable, archaic) Verbal exchange, conversation.

* 1847 , , (Jane Eyre), Chapter XVIII

Two or three of the gentlemen sat near him, and I caught at times scraps of their conversation across the room. At first I could not make much sense of what I heard; for the discourse of Louisa Eshton and Mary Ingram, who sat nearer to me, confused the fragmentary sentences that reached me at intervals.

(uncountable) Expression in words, either speech or writing.

* {{quote-magazine, date=2012-03

, author= , title=Pixels or Perish , volume=100, issue=2, page=106 , magazine= citation , passage=Drawings and pictures are more than mere ornaments in scientific discourse . Blackboard sketches, geological maps, diagrams of molecular structure, astronomical photographs, MRI images, the many varieties of statistical charts and graphs: These pictorial devices are indispensable tools for presenting evidence, for explaining a theory, for telling a story.}}

(countable) A formal lengthy exposition of some subject, either spoken or written.

The preacher gave us a long discourse on duty.

(countable) Any rational expression, reason.

* South

difficult, strange, and harsh to the discourses of natural reason

* Shakespeare

Sure he that made us with such large discourse , / Looking before and after, gave us not / That capability and godlike reason / To rust in us unused.

(social sciences, countable) An institutionalized way of thinking, a social boundary defining what can be said about a specific topic (after ).

* 2007 , Christine L. Marran, Poison Woman: Figuring Female Transgression in Modern Japanese Culture (page 137)

Furthermore, it should be recalled from the previous chapter that criminological discourse of the 1930s deemed every woman a potential criminal, implicitly including the domestic woman.

* 2008 , Jane Anna Gordon, Lewis Gordon, A Companion to African-American Studies (page 308)

But equally important to the emergence of uniquely African-American queer discourses is the refusal of African-American movements for liberation to address adequately issues of sexual orientation and gender identity.

(obsolete) Dealing; transaction.

* Beaumont and Fletcher

Good Captain Bessus, tell us the discourse / Betwixt Tigranes and our king, and how / We got the victory.

Noun

A system of rules and principles for speaking and writing a language.

(uncountable, linguistics) The study of the internal structure of words (morphology) and the use of words in the construction of phrases and sentences (syntax).

A book describing the rules of grammar of a language.

(computing theory) A formal system specifying the syntax of a language.

* 2006 , Patrick Blackburn · Johan Bos · Kristina Striegnitz, Learn Prolog Now! , §8.2

Because real lexicons are big and complex, from a software engineering perspective it is best to write simple grammars that have a simple, well-defined way, of pulling out the information they need from vast lexicons. That is, grammars should be thought of as separate entities which can access the information contained in lexicons. We can then use specialised mechanisms for efficiently storing the lexicon and retrieving data from it.

(computing theory) A formal system defining a formal language

The basic rules or principles of a field of knowledge or a particular skill.

* 2011 , (Javier Solana) and (Daniel Innerarity), Project Syndicate, The New Grammar of Power :

We must learn a new grammar of power in a world that is made up more of the common good – or the common bad – than of self-interest or national interest.

(British, archaic) A textbook.

a grammar of geography

(UK) A grammar school.

* 2012, Graeme Paton, A green light for more grammars ?'' (in ''The Daily Telegraph , 11 January 2012)