from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of or relating to grammar.
  • adj. Conforming to the rules of grammar: a grammatical sentence.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Acceptable as a correct sentence or clause as determined by the rules and conventions of the grammar, or morpho-syntax of the language.
  • adj. Of or pertaining to grammar.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of or pertaining to grammar; of the nature of grammar.
  • adj. According to the rules of grammar; grammatically correct.

from The Century Dictionary and Cyclopedia

  • Of or pertaining to grammar: as, a grammatical rule, error, question, distinction, etc.
  • Conforming to or in accordance with the rules of grammar: as, a grammatical sentence.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. of or pertaining to grammar
  • adj. conforming to the rules of grammar or usage accepted by native speakers


Late Latin grammaticālis, from Latin grammaticus, from Greek grammatikos, of letters; see grammar.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin grammaticālis. (Wiktionary)



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