Definition of "grammatical" in English

adjective

1. Not breaching any constraints of the grammar, or morpho-syntax, of the relevant language.

   • Your writing in English is not grammatical enough for publication, so we will hire an editor to fix it where necessary while preserving the intended meaning.
   • These unidiomatic utterances are easily comprehensible but are not grammatical.

2. Of or pertaining to grammar.

   • The writing was measured for both grammatical complexity and accuracy factors.