'Grammatical' definitions:

Definition of 'grammatical'

From: WordNet
adjective
Of or pertaining to grammar; "the grammatic structure of a sentence"; "grammatical rules"; "grammatical gender" [syn: grammatical, grammatic]
adjective
Conforming to the rules of grammar or usage accepted by native speakers; "spoke in grammatical sentences" [syn: grammatical, well-formed] [ant: ill-formed, ungrammatical]

Definition of 'Grammatical'

From: GCIDE
  • Grammatical \Gram*mat"ic*al\, a. [L. grammaticus, grammaticalis; Gr. ? skilled in grammar, knowing one's letters, from ? a letter: cf. F. grammatical. See Grammar.]
  • 1. Of or pertaining to grammar; of the nature of grammar; as, a grammatical rule. [1913 Webster]
  • 2. According to the rules of grammar; grammatically correct; as, the sentence is not grammatical; the construction is not grammatical. --{Gram*mat"ic*al*ly}, adv. -- {Gram*mat"ic*al*ness}, n. [1913 Webster]