Artificial refers to something which is not natural. Its original sense, related to artifact and artifice, refers to a product of human endeavor; a more English synonym is man-made. It is also used, however, to mean false, a substitute for the real thing, as in artificial turf or artificial sweetener.
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Adjective 1. not of natural origin; prepared or made artificially; "man-made fibers"; "synthetic leather" (synonym) semisynthetic, synthetic (similar) artificial, unreal (classification) chemistry, chemical science