Meaning of “grammar” - Learner’s Dictionary

grammar

noun us uk /ˈɡræmər/
the rules of grammara guide to English grammar and usageThe book also has a chapter on grammar.What is the most effective way of teaching grammar?I can communicate reasonably effectively in French but my grammar is fairly poor.
SUBJECT [ U ]

A2 the way you combine words and change their form and position in a sentence, or the rules or study of this

BOOK [ C ] mainly UK

a book of grammar rules

(Definition of “grammar” from the Cambridge Learner’s Dictionary © Cambridge University Press)