In philosophy, a term employed by Kant to
describe a judgement in which the predicate
is not contained within the subject; for
example, `The flower is blue' is synthetic,
since every flower is not blue. It is the
converse of analytic.

2.
An artificial material made from chemicals.
Many of the materials used in everyday life
are artificial, including plastics
(polythene, polystyrene), synthetic fibres
(nylon, acrylics, polyesters), synthetic
resins, and synthetic rubber. Plastics are
made mainly from petroleum chemicals by
polymerization, in which small molecules are
joined to make very large ones.