grammar
//ˈɡræm.ər//
Noun
grammarSingular
grammarsPlural
1
The set of structural rules governing the composition of clauses, phrases, and words in a language.
English grammar can be difficult to learn.
2
A book or treatise describing the rules of a language.
I bought a grammar to help me learn French.
3
A person's knowledge or use of the rules of language.
Her grammar has improved a lot since she started reading more.