* Grammar: The system of rules that govern how a language is used, including how words are combined into phrases and sentences.
* Grammatical: Something that adheres to these rules.
Examples:
* A grammatical sentence: "The cat sat on the mat." This sentence follows the rules of English grammar.
* A grammatical error: "Me went to the store." This sentence violates the rules of English grammar, using the incorrect pronoun "me" as the subject.
* Grammatical analysis: The process of examining a sentence to identify its parts of speech and how they relate to each other.
In short, something is "grammatical" when it is correct according to the established rules of the language.