Definition from Wiktionary, the free dictionary
- Of, related to or connected with syntax.
- The sentence “I saw he” contains a syntactic mistake.
- 2001, Martin Haspelmath, Language Typology and Language Universals: An International Handbook, page 674:
- the rules specifying how agglutinative morphemes are combined with each other are more syntactic than morphological by their nature and thus are closer to rules specifying how word-forms are combined with each other.
Related terms 
of, related to or connected with syntax