grammar

noun
1
the rules in a language for changing the form of words and joining them into sentences
دستور زبان, گرامر, قواعد زبان
see also functional grammar, generative grammar, transformational grammar, universal grammar
2
a person’s knowledge and use of a language
دستور زبان, گرامر
His grammar is appalling.
bad grammar
3
a book containing a description of the rules of a language
کتاب دستور زبان
a French grammar