synthetic (Noun) — A compound made artificially by chemical reactions.
synthetic (Adjective) — (chemistry) not of natural origin; prepared or made artificially. ex. "synthetic leather"
synthetic (Adjective) — Involving or of the nature of synthesis (combining separate elements to form a coherent whole) as opposed to analysis. ex. "limnology is essentially a synthetic science composed of elements...that extend well beyond the limits of biology"
synthetic (Adjective) — (linguistics) systematic combining of root and modifying elements into single words.
synthetic (Adjective) — (logic) of a proposition whose truth value is determined by observation or facts. ex. "'all men are arrogant' is a synthetic proposition"
synthetic (Adjective) — Artificial as if portrayed in a film. ex. "a novel with flat synthetic characters"
synthetic (Adjective) — Not genuine or natural. ex. "counterfeit rhetoric that flourishes when passions are synthetic"