Definition of "Synthetic" :

noun: a compound made artificially by chemical reactions

adjective: of a proposition whose truth value is determined by observation or facts

"All men are arrogant' is a synthetic proposition."

adjective: systematic combining of root and modifying elements into single words

adjective: involving or of the nature of synthesis (combining separate elements to form a coherent whole) as opposed to analysis

"Limnology is essentially a synthetic science composed of elements...that extend well beyond the limits of biology."

adjective: not genuine or natural

"Counterfeit rhetoric that flourishes when passions are synthetic."

adjective: artificial as if portrayed in a film

adjective: not of natural origin; prepared or made artificially

"Synthetic leather."