grammaticality

/ɡrəˌmætɪˈkæləti/
noun
  1. The quality or state of being grammatically correct according to the rules of a language.
    • The teacher checked the essay for grammaticality before grading it.
    • The grammaticality of the sentence was questioned because of the missing verb.
    • In linguistics, grammaticality is often tested by asking native speakers if a sentence sounds right.