1. Relating to, involving, or of the nature of synthesis. 2. Produced by synthesis, especially not of natural origin. 3. George F. Will 4. artificial 5. Relating to or being a language, such as Latin or Russian, that uses inflectional affixes to express syntactic relationships. 6. Relating to or being a proposition that attributes to a subject a predicate not inherent in the subject and that does not result in a contradiction if negated. 7. A synthetic chemical compound or material.