American English

Definition of grammar noun from the Oxford Advanced American Dictionary



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  1. 1[uncountable] the rules in a language for changing the form of words and joining them into sentences the basic rules of grammar English grammar see also generative grammar
  2. 2[uncountable] a person's knowledge and use of a language His grammar is awful. bad grammar
  3. 3[countable] a book containing a description of the rules of a language a French grammar
See the Oxford Advanced Learner's Dictionary entry: grammar